Unable to open my Apple Calendar shows "The server responded with an error" error
When I try to open my Apple calendar, I get an error message: "The server responded with an error." The option buttons are: Revert to Server, Try Again, and Ignore. None of them work! The same error box with the same 3 options immediately pops up.
This may have started when the dinner reservation I was making used Google and it tried to add the event to my calendar. Not sure about this.
My calendar still works fine on my iPad & iPhone.
Suggestions please!
[Re-Titled by Moderator]
MacBook Air 13″, macOS 12.6