julienlg That page works for me. However, there were two critical errors today for your forum, both reading:
[2020-04-22 15:41:48] production.ERROR: PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'created_at' in 'field list' in
/app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:61
Stack trace:
#0 /app/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(61): PDO->prepare('insert into `po...', Array)
#1 /app/vendor/illuminate/database/Connection.php(452): Doctrine\DBAL\Driver\PDOConnection->prepare('insert into `po...')
#2 /app/vendor/illuminate/database/Connection.php(657): Illuminate\Database\Connection->Illuminate\Database\{closure}('insert into `po...', Array)
#3 /app/vendor/illuminate/database/Connection.php(624): Illuminate\Database\Connection->runQueryCallback('insert into `po...', Array, Object(Closure))
#4 /app/vendor/illuminate/database/Connection.php(459): Illuminate\Database\Connection->run('insert into `po...', Array, Object(Closure))
#5 /app/vendor/illuminate/database/Connection.php(411): Illuminate\Database\Connection->statement('insert into `po...', Array)
#6 /app/vendor/illuminate/database/Query/Builder.php(2611): Illuminate\Database\Connection->insert('insert into `po...', Array)
#7 /app/vendor/illuminate/database/Eloquent/Relations/Concerns/InteractsWithPivotTable.php(216): Illuminate\Database\Query\Builder->insert(Array)
#8 /app/vendor/fof/reactions/src/Listener/SaveReactionsToDatabase.php(97): Illuminate\Database\Eloquent\Relations\BelongsToMany->attach(Object(FoF\Reactions\Reaction), Array)
It suggests that fof/reactions is involved. You could try disabling that, if the problem persists? Either way, I don't think this is a FreeFlarum issue.