I was using flagrow/upload extension whithout any issue.
Upgrading to beta12, seems that flagrow/upload extension have to be replaced by fof/upload one.
I removed flagrow/upload, installed fof/upload
When I try to activate it, have this errors (debug mode activated) :
POST https://lafabriq.org/forum/api/extensions/fof-upload
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`cdlpweb_flarum`.`#sql-e3d_5330673`, CONSTRAINT `flfof_upload_downloads_post_id_foreign` FOREIGN KEY (`post_id`) REFERENCES `flposts` (`id`) ON DELETE SET NULL) in /home/cdlpweb/lafabriq.org/forum/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php:117\nStack trace:
#0 /home/cdlpweb/lafabriq.org/forum/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php(117): PDOStatement->execute(NULL)
#1 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Connection.php(458): Doctrine\\DBAL\\Driver\\PDOStatement->execute()
#2 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Connection.php(657): Illuminate\\Database\\Connection->Illuminate\\Database\\{closure}('alter table `fl...', Array)
#3 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Connection.php(624): Illuminate\\Database\\Connection->runQueryCallback('alter table `fl...', Array, Object(Closure))
#4 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Connection.php(459): Illuminate\\Database\\Connection->run('alter table `fl...', Array, Object(Closure))
#5 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Schema/Blueprint.php(97): Illuminate\\Database\\Connection->statement('alter table `fl...')
#6 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Schema/Builder.php(264): Illuminate\\Database\\Schema\\Blueprint->build(Object(Illuminate\\Database\\MySqlConnection), Object(Illuminate\\Database\\Schema\\Grammars\\MySqlGrammar))
#7 /home/cdlpweb/lafabriq.org/forum/vendor/illuminate/database/Schema/Builder.php(149): Illuminate\\Database\\Schema\\Builder->build(Object(Illuminate\\Database\\Schema\\Blueprint))
#8 /home/cdlpweb/lafabriq.org/forum/vendor/fof/upload/migrations/2020_02_06_07_alter_downloads_add_post_constraint.php(13): Illuminate\\Database\\Schema\\Builder->table('fof_upload_down...', Object(Closure))
#9 [internal function]: Illuminate\\Filesystem\\Filesystem->{closure}(Object(Illuminate\\Database\\Schema\\MySqlBuilder))
#10 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Database/Migrator.php(197): call_user_func(Object(Closure), Object(Illuminate\\Database\\Schema\\MySqlBuilder))
#11 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Database/Migrator.php(128): Flarum\\Database\\Migrator->runClosureMigration(Array)
#12 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Database/Migrator.php(111): Flarum\\Database\\Migrator->runUp('/home/cdlpweb/l...', '2020_02_06_07_a...', Object(Flarum\\Extension\\Extension))
#13 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Database/Migrator.php(85): Flarum\\Database\\Migrator->runMigrationList('/home/cdlpweb/l...', Array, Object(Flarum\\Extension\\Extension))
#14 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Extension/Extension.php(352): Flarum\\Database\\Migrator->run('/home/cdlpweb/l...', Object(Flarum\\Extension\\Extension))
#15 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Extension/ExtensionManager.php(234): Flarum\\Extension\\Extension->migrate(Object(Flarum\\Database\\Migrator), 'up')
#16 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Extension/ExtensionManager.php(127): Flarum\\Extension\\ExtensionManager->migrate(Object(Flarum\\Extension\\Extension))
#17 /home/cdlpweb/lafabriq.org/forum/vendor/flarum/core/src/Api/Controller/UpdateExtensionController.php(48): Flarum\\Extension\\ExtensionManager->enable('fof-upload')
...
php flarum info
Flarum core 0.1.0-beta.12
PHP version: 7.2.30
Loaded extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bz2, calendar, ctype, curl, hash, filter, ftp, gettext, gmp, SPL, iconv, pcntl, readline, Reflection, session, standard, shmop, SimpleXML, mbstring, tokenizer, xml, bcmath, dom, enchant, fileinfo, gd, imap, intl, json, ldap, exif, mysqli, mysqlnd, PDO, pdo_mysql, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, pspell, soap, sockets, sysvmsg, sysvsem, sysvshm, tidy, wddx, xmlreader, xmlrpc, xmlwriter, xsl, zip
+---------------------------------+----------------+--------+
| Flarum Extensions | | |
+---------------------------------+----------------+--------+
| ID | Version | Commit |
+---------------------------------+----------------+--------+
| milescellar-lang-french | v1.6.0 | |
| flagrow-analytics | 0.8.0 | |
| flarum-approval | v0.1.0-beta.12 | |
| noriods-auto-more | 0.3.0 | |
| flarum-bbcode | v0.1.0-beta.12 | |
| michaelbelgium-discussion-views | v3.2.0 | |
| flarum-emoji | v0.1.0-beta.12 | |
| flagrow-direct-links | 0.2.0 | |
| fof-impersonate | 0.4.0 | |
| flarum-flags | v0.1.0-beta.12 | |
| fof-byobu | 0.5.0 | |
| fof-default-user-preferences | 0.1.0 | |
| fof-links | 0.3.0 | |
| fof-merge-discussions | 0.3.3 | |
| fof-pages | 0.3.1 | |
| fof-polls | 0.1.2 | |
| fof-profile-image-crop | 0.1.1 | |
| fof-socialprofile | 0.1.2 | |
| fof-split | 0.4.3 | |
| fof-user-bio | 0.1.3 | |
| fof-user-directory | 0.3.4 | |
| rooaaar-lang-french-extended | 1.15.0 | |
| flarum-likes | v0.1.0-beta.12 | |
| flarum-lock | v0.1.0-beta.12 | |
| kilowhat-mailing | 0.2.2 | |
| flarum-markdown | v0.1.0-beta.12 | |
| kvothe-pipetables | 1.0.9 | |
| flarum-mentions | v0.1.0-beta.12 | |
| kvothe-online-users | 0.4.0 | |
| zerosonesfun-pwa | 1.3 | |
| flarum-pusher | v0.1.0-beta.12 | |
| reflar-level-ranks | 1.2.2 | |
| flarum-statistics | v0.1.0-beta.12 | |
| flarum-sticky | v0.1.0-beta.12 | |
| flarum-subscriptions | v0.1.0-beta.12 | |
| flarum-suspend | v0.1.0-beta.12 | |
| flarum-tags | v0.1.0-beta.12 | |
| fof-html-errors | 0.3.1 | |
| extiverse-bazaar | 0.4.1 | |
| squeevee-fancybox | 0.2-beta | |
+---------------------------------+----------------+--------+
Base URL: https://lafabriq.org/forum
Installation path: /home/cdlpweb/lafabriq.org/forum
Debug mode: ON