An error occurred while trying to load this page.

katos

wolfman Can you try to disable antoinefr-bbcode-fa and fof-formatting and try again please ?

wolfman

katos Disabling antoinefr-bbcode-fa and fof-formatting is not enough and still throws an error. But when flarum-bbcode is also disabled, the forum page appears again.

katos

wolfman How strange - I'll do some testing and see what I can replicate 🙂

wolfman

katos Thanks. Maybe it is also system-related - which honestly would be quite strange. But @omarehab and I use both Ubuntu 22.04, PHP 8.1 and nginx 1.18.

wolfman

I downgraded s9e/sweetdom and therefore s9e/text-formatter to the older version and everything works as intended again. But this is certainly no long-term solution!

composer update s9e/text-formatter:^2.14 s9e/sweetdom:^2

jn8

wolfman same error & same solution worked for me.
Thank your for your post!

sys-info:
fresh flarum installation on Ubuntu 22.04, PHP8.1, Apache2.4.52

error:
s9e\SweetDOM\Document::query(): Return value must be of type DOMNodeList, bool returned

fix:
composer update s9e/text-formatter:^2.14 s9e/sweetdom:^2

kaitou1412

wolfman

thank you, Alhamdulillaah.
I've been searching for solution since some days ago. disabling flarum-bbcode made the forum back online..
yes, we need long term solution.
have the developers been notified?

wolfman

kaitou1412 have the developers been notified?

I think @katos is aware of the situation.

katos

wolfman sure am. Interestingly myself and @IanM and across this one recently and downgraded some composer dependencies but then when we updated again it worked absolutely fine, so rather bizarre.

GreXXL

wolfman have you tried disabling all extensions and just run the core? Does the error still occur, then? If not, please activate extensions individually to see which causes the error. I see you are using editor extensions on a dev-main branch that I haven't heard about.

wolfman

GreXXL The problem disappears, when disabling these three extensions:

antoinefr-bbcode-fa
fof-formatting
flarum-bbcode

wolfman

GreXXL @IanM I just came home from work and double checked it!

With s9e/sweetdom 3.2.0 and s9e/text-formatter 2.15.0 the following happens with these plugins individually activated:

antoinefr-bbcode-fa is innocent and works fine.
fof-formatting specifically and only the option MediaEmbed of the plugin triggers the error.
flarum-bbcode triggers the error as well.
wolfgang-demeter-bbcode-5star-rating requires flarum-bbcode and doesn't function without it. To deactivate flarum-bbcode this extension has to be deactivated as well.

When downgraded to s9e/sweetdom 2.1.2 and s9e/text-formatter 2.14.3 everything works again as expected.

With flarum-bbcode this is the stack trace of the error:

[2023-12-13 17:34:23] flarum.ERROR: TypeError: s9e\SweetDOM\Document::query(): Return value must be of type DOMNodeList, bool returned in /var/www/example.com/flarum/vendor/s9e/sweetdom/src/Document.php:75
Stack trace:
#0 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateNormalizations/AbstractNormalization.php(73): s9e\SweetDOM\Document->query()
#1 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateNormalizations/AbstractNormalization.php(43): s9e\TextFormatter\Configurator\TemplateNormalizations\AbstractNormalization->getNodes()
#2 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateNormalizer.php(146): s9e\TextFormatter\Configurator\TemplateNormalizations\AbstractNormalization->normalize()
#3 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/Items/Template.php(165): s9e\TextFormatter\Configurator\TemplateNormalizer->normalizeTemplate()
#4 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateNormalizer.php(124): s9e\TextFormatter\Configurator\Items\Template->normalize()
#5 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Plugins/BBCodes/Configurator.php(162): s9e\TextFormatter\Configurator\TemplateNormalizer->normalizeTag()
#6 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Plugins/BBCodes/Configurator.php(140): s9e\TextFormatter\Plugins\BBCodes\Configurator->addFromConfig()
#7 /var/www/example.com/flarum/vendor/flarum/bbcode/src/Configure.php(31): s9e\TextFormatter\Plugins\BBCodes\Configurator->addFromRepository()
#8 /var/www/example.com/flarum/vendor/flarum/bbcode/src/Configure.php(18): Flarum\BBCode\Configure->addTagsFromRepositories()
#9 /var/www/example.com/flarum/vendor/flarum/core/src/Foundation/ContainerUtil.php(30): Flarum\BBCode\Configure->__invoke()
#10 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(177): Flarum\Foundation\ContainerUtil::Flarum\Foundation\{closure}()
#11 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(213): Flarum\Formatter\Formatter->getConfigurator()
#12 /var/www/example.com/flarum/vendor/illuminate/cache/Repository.php(426): Flarum\Formatter\Formatter->Flarum\Formatter\{closure}()
#13 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(214): Illuminate\Cache\Repository->rememberForever()
#14 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(257): Flarum\Formatter\Formatter->getComponent()
#15 /var/www/example.com/flarum/vendor/flarum/core/src/Forum/ForumServiceProvider.php(112): Flarum\Formatter\Formatter->getJs()
#16 [internal function]: Flarum\Forum\ForumServiceProvider->Flarum\Forum\{closure}()
#17 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/Source/StringSource.php(38): call_user_func()
#18 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/Source/StringSource.php(49): Flarum\Frontend\Compiler\Source\StringSource->getContent()
#19 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/RevisionCompiler.php(174): Flarum\Frontend\Compiler\Source\StringSource->getCacheDifferentiator()
#20 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/RevisionCompiler.php(71): Flarum\Frontend\Compiler\RevisionCompiler->calculateRevision()
#21 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Content/Assets.php(105): Flarum\Frontend\Compiler\RevisionCompiler->commit()
#22 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Content/Assets.php(63): Flarum\Frontend\Content\Assets->forceCommit()
#23 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Frontend.php(62): Flarum\Frontend\Content\Assets->__invoke()
#24 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Frontend.php(54): Flarum\Frontend\Frontend->populate()
#25 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Controller.php(32): Flarum\Frontend\Frontend->document()
#26 /var/www/example.com/flarum/vendor/flarum/core/src/Http/RouteHandlerFactory.php(41): Flarum\Frontend\Controller->handle()
#27 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ExecuteRoute.php(27): Flarum\Http\RouteHandlerFactory->Flarum\Http\{closure}()
#28 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ExecuteRoute->process()
#29 /var/www/example.com/flarum/vendor/fof/terms/src/Middlewares/RegisterMiddleware.php(59): Laminas\Stratigility\Next->handle()
#30 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): FoF\Terms\Middlewares\RegisterMiddleware->process()
#31 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ContentTypeOptionsHeader.php(21): Laminas\Stratigility\Next->handle()
#32 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ContentTypeOptionsHeader->process()
#33 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ReferrerPolicyHeader.php(30): Laminas\Stratigility\Next->handle()
#34 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ReferrerPolicyHeader->process()
#35 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/FlarumPromotionHeader.php(30): Laminas\Stratigility\Next->handle()
#36 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\FlarumPromotionHeader->process()
#37 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ShareErrorsFromSession.php(57): Laminas\Stratigility\Next->handle()
#38 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ShareErrorsFromSession->process()
#39 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/CheckCsrfToken.php(36): Laminas\Stratigility\Next->handle()
#40 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\CheckCsrfToken->process()
#41 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ResolveRoute.php(69): Laminas\Stratigility\Next->handle()
#42 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ResolveRoute->process()
#43 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/SetLocale.php(51): Laminas\Stratigility\Next->handle()
#44 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\SetLocale->process()
#45 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/AuthenticateWithSession.php(31): Laminas\Stratigility\Next->handle()
#46 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\AuthenticateWithSession->process()
#47 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/RememberFromCookie.php(52): Laminas\Stratigility\Next->handle()
#48 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\RememberFromCookie->process()
#49 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/StartSession.php(61): Laminas\Stratigility\Next->handle()
#50 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\StartSession->process()
#51 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/CollectGarbage.php(46): Laminas\Stratigility\Next->handle()
#52 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\CollectGarbage->process()
#53 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ParseJsonBody.php(28): Laminas\Stratigility\Next->handle()
#54 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ParseJsonBody->process()
#55 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/HandleErrors.php(57): Laminas\Stratigility\Next->handle()
#56 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\HandleErrors->process()
#57 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/InjectActorReference.php(25): Laminas\Stratigility\Next->handle()
#58 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\InjectActorReference->process()
#59 /var/www/example.com/flarum/vendor/fof/merge-discussions/src/Middleware/Redirection.php(28): Laminas\Stratigility\Next->handle()
#60 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): FoF\MergeDiscussions\Middleware\Redirection->process()
#61 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle()
#62 /var/www/example.com/flarum/vendor/middlewares/request-handler/src/RequestHandler.php(84): Laminas\Stratigility\MiddlewarePipe->process()
#63 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\RequestHandler->process()
#64 /var/www/example.com/flarum/vendor/middlewares/base-path-router/src/BasePathRouter.php(101): Laminas\Stratigility\Next->handle()
#65 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\BasePathRouter->process()
#66 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Middleware/OriginalMessages.php(36): Laminas\Stratigility\Next->handle()
#67 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\Middleware\OriginalMessages->process()
#68 /var/www/example.com/flarum/vendor/middlewares/base-path/src/BasePath.php(73): Laminas\Stratigility\Next->handle()
#69 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\BasePath->process()
#70 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ProcessIp.php(24): Laminas\Stratigility\Next->handle()
#71 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ProcessIp->process()
#72 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle()
#73 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(64): Laminas\Stratigility\MiddlewarePipe->process()
#74 /var/www/example.com/flarum/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(73): Laminas\Stratigility\MiddlewarePipe->handle()
#75 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run()
#76 /var/www/example.com/flarum/public/index.php(26): Flarum\Http\Server->listen()
#77 {main

And this is the stack trace with fof-formatting, which seems to be another error caused by the same updated libraries:

[2023-12-13 17:36:57] flarum.ERROR: RuntimeException: Unsupported xsl:attribute name 'data-s9e-mediaembed' in /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateChecks/DisallowUnsupportedXSL.php:39
Stack trace:
#0 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateChecks/AbstractXSLSupportCheck.php(90): s9e\TextFormatter\Configurator\TemplateChecks\DisallowUnsupportedXSL->checkXslAttributeElement()
#1 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateChecks/AbstractXSLSupportCheck.php(42): s9e\TextFormatter\Configurator\TemplateChecks\AbstractXSLSupportCheck->checkXslElements()
#2 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateChecker.php(129): s9e\TextFormatter\Configurator\TemplateChecks\AbstractXSLSupportCheck->check()
#3 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/TemplateChecker.php(101): s9e\TextFormatter\Configurator\TemplateChecker->checkTemplate()
#4 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Plugins/MediaEmbed/Configurator.php(169): s9e\TextFormatter\Configurator\TemplateChecker->checkTag()
#5 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Plugins/MediaEmbed/Configurator.php(126): s9e\TextFormatter\Plugins\MediaEmbed\Configurator->addTag()
#6 /var/www/example.com/flarum/vendor/s9e/text-formatter/src/Configurator/Bundles/MediaPack.php(31): s9e\TextFormatter\Plugins\MediaEmbed\Configurator->add()
#7 /var/www/example.com/flarum/vendor/fof/formatting/extend.php(40): s9e\TextFormatter\Configurator\Bundles\MediaPack->configure()
#8 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(177): Flarum\Extension\Extension->FoF\Formatting\{closure}()
#9 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(213): Flarum\Formatter\Formatter->getConfigurator()
#10 /var/www/example.com/flarum/vendor/illuminate/cache/Repository.php(426): Flarum\Formatter\Formatter->Flarum\Formatter\{closure}()
#11 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(214): Illuminate\Cache\Repository->rememberForever()
#12 /var/www/example.com/flarum/vendor/flarum/core/src/Formatter/Formatter.php(257): Flarum\Formatter\Formatter->getComponent()
#13 /var/www/example.com/flarum/vendor/flarum/core/src/Forum/ForumServiceProvider.php(112): Flarum\Formatter\Formatter->getJs()
#14 [internal function]: Flarum\Forum\ForumServiceProvider->Flarum\Forum\{closure}()
#15 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/Source/StringSource.php(38): call_user_func()
#16 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/Source/StringSource.php(49): Flarum\Frontend\Compiler\Source\StringSource->getContent()
#17 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/RevisionCompiler.php(174): Flarum\Frontend\Compiler\Source\StringSource->getCacheDifferentiator()
#18 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Compiler/RevisionCompiler.php(71): Flarum\Frontend\Compiler\RevisionCompiler->calculateRevision()
#19 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Content/Assets.php(105): Flarum\Frontend\Compiler\RevisionCompiler->commit()
#20 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Content/Assets.php(63): Flarum\Frontend\Content\Assets->forceCommit()
#21 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Frontend.php(62): Flarum\Frontend\Content\Assets->__invoke()
#22 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Frontend.php(54): Flarum\Frontend\Frontend->populate()
#23 /var/www/example.com/flarum/vendor/flarum/core/src/Frontend/Controller.php(32): Flarum\Frontend\Frontend->document()
#24 /var/www/example.com/flarum/vendor/flarum/core/src/Http/RouteHandlerFactory.php(41): Flarum\Frontend\Controller->handle()
#25 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ExecuteRoute.php(27): Flarum\Http\RouteHandlerFactory->Flarum\Http\{closure}()
#26 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ExecuteRoute->process()
#27 /var/www/example.com/flarum/vendor/fof/terms/src/Middlewares/RegisterMiddleware.php(59): Laminas\Stratigility\Next->handle()
#28 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): FoF\Terms\Middlewares\RegisterMiddleware->process()
#29 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ContentTypeOptionsHeader.php(21): Laminas\Stratigility\Next->handle()
#30 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ContentTypeOptionsHeader->process()
#31 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ReferrerPolicyHeader.php(30): Laminas\Stratigility\Next->handle()
#32 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ReferrerPolicyHeader->process()
#33 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/FlarumPromotionHeader.php(30): Laminas\Stratigility\Next->handle()
#34 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\FlarumPromotionHeader->process()
#35 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ShareErrorsFromSession.php(57): Laminas\Stratigility\Next->handle()
#36 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ShareErrorsFromSession->process()
#37 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/CheckCsrfToken.php(36): Laminas\Stratigility\Next->handle()
#38 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\CheckCsrfToken->process()
#39 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ResolveRoute.php(69): Laminas\Stratigility\Next->handle()
#40 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ResolveRoute->process()
#41 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/SetLocale.php(51): Laminas\Stratigility\Next->handle()
#42 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\SetLocale->process()
#43 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/AuthenticateWithSession.php(31): Laminas\Stratigility\Next->handle()
#44 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\AuthenticateWithSession->process()
#45 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/RememberFromCookie.php(52): Laminas\Stratigility\Next->handle()
#46 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\RememberFromCookie->process()
#47 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/StartSession.php(61): Laminas\Stratigility\Next->handle()
#48 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\StartSession->process()
#49 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/CollectGarbage.php(46): Laminas\Stratigility\Next->handle()
#50 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\CollectGarbage->process()
#51 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ParseJsonBody.php(28): Laminas\Stratigility\Next->handle()
#52 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ParseJsonBody->process()
#53 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/HandleErrors.php(57): Laminas\Stratigility\Next->handle()
#54 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\HandleErrors->process()
#55 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/InjectActorReference.php(25): Laminas\Stratigility\Next->handle()
#56 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\InjectActorReference->process()
#57 /var/www/example.com/flarum/vendor/fof/merge-discussions/src/Middleware/Redirection.php(28): Laminas\Stratigility\Next->handle()
#58 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): FoF\MergeDiscussions\Middleware\Redirection->process()
#59 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle()
#60 /var/www/example.com/flarum/vendor/middlewares/request-handler/src/RequestHandler.php(84): Laminas\Stratigility\MiddlewarePipe->process()
#61 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\RequestHandler->process()
#62 /var/www/example.com/flarum/vendor/middlewares/base-path-router/src/BasePathRouter.php(101): Laminas\Stratigility\Next->handle()
#63 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\BasePathRouter->process()
#64 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Middleware/OriginalMessages.php(36): Laminas\Stratigility\Next->handle()
#65 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Laminas\Stratigility\Middleware\OriginalMessages->process()
#66 /var/www/example.com/flarum/vendor/middlewares/base-path/src/BasePath.php(73): Laminas\Stratigility\Next->handle()
#67 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Middlewares\BasePath->process()
#68 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Middleware/ProcessIp.php(24): Laminas\Stratigility\Next->handle()
#69 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/Next.php(49): Flarum\Http\Middleware\ProcessIp->process()
#70 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(75): Laminas\Stratigility\Next->handle()
#71 /var/www/example.com/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(64): Laminas\Stratigility\MiddlewarePipe->process()
#72 /var/www/example.com/flarum/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(73): Laminas\Stratigility\MiddlewarePipe->handle()
#73 /var/www/example.com/flarum/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run()
#74 /var/www/example.com/flarum/public/index.php(26): Flarum\Http\Server->listen()
#75 {main}

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GreXXL

omarehab wolfman jn8 kaitou1412 for your reference the issue has been addressed in flarum/core 1.8.4 (https://discuss.flarum.org/d/32901-staff-diary-v20-cycle/93)