Hmm. The link in the message the automation sent before the URL was changed is <a href='https://my-forum.discourse.group/admin/plugins/explorer/queries/79'>Abfrage im Daten-Explorer anzeigen</a>.
It no longer takes me to the error page 
. It takes me to https://my-forum.discourse.group/admin/plugins/discourse-data-explorer/queries. I hoped it would take me to https://my-forum.discourse.group/admin/plugins/discourse-data-explorer/queries/79