Quite similar to T362961. We see this in our error logs:
PHP message: [2024-05-02 15:58:11] EXCEPTION: (Exception) Application search engines of class "PhabricatorFileSearchEngine" can not be used to build dashboard panels. at [<phorge>/src/applications/dashboard/paneltype/PhabricatorDashboardQueryPanelType.php:202]

https://phabricator.wikimedia.org/W431 can only be accessed by @revi. Could you please disable that panel (and potentially remove it from dashboards)? Thanks in advance!