Sharepoint calendar is displaying an error message that a list does not exist

[GregSimonis]

I have a calendar with several lists overlayed in it. How do I tell which list it is referencing the error msg.? I am using SharePoint online.

[#2]

@GregSimonis,

While looking at the primary view that has all the overlays on it, click the Calendar ribbon tab, then choose Calendar Overlays and click into each overlay and verify that the URL and list is correct.  Perhaps a list was renamed or site deleted.