Hi there! My users are having a problem that they cannot post topics on the "Buggy" Tag on my Flarum.

As you can see, they have the permissions to post on "Buggy", but hey get this error on debug mode.
403 Forbidden
POST https://www.intocables.net/public/api/discussions
{
"errors": [
{
"status": "403",
"code": "permission_denied",
"detail": "Flarum\User\Exception\PermissionDeniedException in /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/User/AssertPermissionTrait.php:31\nStack trace:\n#0 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/User/AssertPermissionTrait.php(61): Flarum\Discussion\Command\StartDiscussionHandler->assertPermission(false)\n#1 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Discussion/Command/StartDiscussionHandler.php(61): Flarum\Discussion\Command\StartDiscussionHandler->assertCan(Object(Flarum\User\User), 'startDiscussion')\n#2 /var/www/vhosts/intocables.net/httpdocs/vendor/illuminate/bus/Dispatcher.php(90): Flarum\Discussion\Command\StartDiscussionHandler->handle(Object(Flarum\Discussion\Command\StartDiscussion))\n#3 /var/www/vhosts/intocables.net/httpdocs/vendor/illuminate/pipeline/Pipeline.php(128): Illuminate\Bus\Dispatcher->Illuminate\Bus\{closure}(Object(Flarum\Discussion\Command\StartDiscussion))\n#4 /var/www/vhosts/intocables.net/httpdocs/vendor/illuminate/pipeline/Pipeline.php(104): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Flarum\Discussion\Command\StartDiscussion))\n#5 /var/www/vhosts/intocables.net/httpdocs/vendor/illuminate/bus/Dispatcher.php(98): Illuminate\Pipeline\Pipeline->then(Object(Closure))\n#6 /var/www/vhosts/intocables.net/httpdocs/vendor/illuminate/bus/Dispatcher.php(76): Illuminate\Bus\Dispatcher->dispatchNow(Object(Flarum\Discussion\Command\StartDiscussion))\n#7 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Api/Controller/CreateDiscussionController.php(72): Illuminate\Bus\Dispatcher->dispatch(Object(Flarum\Discussion\Command\StartDiscussion))\n#8 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Api/Controller/AbstractSerializeController.php(96): Flarum\Api\Controller\CreateDiscussionController->data(Object(Laminas\Diactoros\ServerRequest), Object(Tobscure\JsonApi\Document))\n#9 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Api/Controller/AbstractCreateController.php(22): Flarum\Api\Controller\AbstractSerializeController->handle(Object(Laminas\Diactoros\ServerRequest))\n#10 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/RouteHandlerFactory.php(38): Flarum\Api\Controller\AbstractCreateController->handle(Object(Laminas\Diactoros\ServerRequest))\n#11 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/DispatchRoute.php(65): Flarum\Http\RouteHandlerFactory->Flarum\Http\{closure}(Object(Laminas\Diactoros\ServerRequest), Array)\n#12 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\DispatchRoute->process(Object(Laminas\Diactoros\ServerRequest), Object(Closure))\n#13 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/SetLocale.php(50): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#14 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\SetLocale->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#15 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/CheckCsrfToken.php(45): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#16 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\CheckCsrfToken->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#17 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/AuthenticateWithHeader.php(55): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#18 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\AuthenticateWithHeader->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#19 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/AuthenticateWithSession.php(32): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#20 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\AuthenticateWithSession->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#21 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/RememberFromCookie.php(51): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#22 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\RememberFromCookie->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#23 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/StartSession.php(61): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#24 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\StartSession->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#25 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Api/Middleware/FakeHttpMethods.php(29): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#26 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Api\Middleware\FakeHttpMethods->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#27 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/ParseJsonBody.php(28): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#28 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\ParseJsonBody->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#29 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Middleware/HandleErrors.php(57): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#30 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\HandleErrors->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#31 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(84): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#32 /var/www/vhosts/intocables.net/httpdocs/vendor/middlewares/request-handler/src/RequestHandler.php(84): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#33 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\RequestHandler->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#34 /var/www/vhosts/intocables.net/httpdocs/vendor/middlewares/base-path-router/src/BasePathRouter.php(97): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#35 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\BasePathRouter->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#36 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Middleware/OriginalMessages.php(42): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#37 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Laminas\Stratigility\Middleware\OriginalMessages->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#38 /var/www/vhosts/intocables.net/httpdocs/vendor/middlewares/base-path/src/BasePath.php(53): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#39 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\BasePath->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\Next))\n#40 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(84): Laminas\Stratigility\Next->handle(Object(Laminas\Diactoros\ServerRequest))\n#41 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(73): Laminas\Stratigility\MiddlewarePipe->process(Object(Laminas\Diactoros\ServerRequest), Object(Laminas\Stratigility\EmptyPipelineHandler))\n#42 /var/www/vhosts/intocables.net/httpdocs/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(96): Laminas\Stratigility\MiddlewarePipe->handle(Object(Laminas\Diactoros\ServerRequest))\n#43 /var/www/vhosts/intocables.net/httpdocs/vendor/flarum/core/src/Http/Server.php(42): Laminas\HttpHandlerRunner\RequestHandlerRunner->run()\n#44 /var/www/vhosts/intocables.net/httpdocs/public/index.php(26): Flarum\Http\Server->listen()\n#45 {main}"
}
]
}