MediaWiki internal error.

Original exception: [YcWo0hgneDrlIe9L2VX14QAAAA8] 2021-12-24 11:02:50: Fatal exception of type "Wikimedia\Rdbms\DBQueryError"

Exception caught inside exception handler.

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