MediaWiki internal error.

Original exception: [821e4707d1019508f9bd9834] 2024-03-28 14:19:59: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"

Exception caught inside exception handler.

Set $wgShowExceptionDetails = true; and $wgShowDBErrorBacktrace = true; at the bottom of LocalSettings.php to show detailed debugging information.