A previously accessed and functional dashboard has stopped working. The error suggests a permissions or data issue, however the dashboard/associated layers have not been touched or changed in months. Both the dashboard and the map are shared as public.

Although I can view the map in webmap viewer, it will not load when added as a new instance to this dashboard. I've tested other apps as well as maps and found that everything else is operational, but the map will not load when added to any app.