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None of my calendars with sync with iCloud anymore. When I long into iCloud with a browser it hangs, then throws up an apple iCloud error box that says my the Calendar has stopped responding. When I did through the text file of errors the last line says "CANNOT LOAD STARTUP DATA"
Sent screen shots and txt file to Apple a week ago. Not response. I just wish I had the access to restart my iCloud instance. Super frustrating.
Which OS are you using, I am currently experiencing the same issue which very much is a backend issue. I was sent over to engineering who immediately blamed the issue on being on the public beta of Big Sur. I was directed to the feedback app and have been without answers or contact for several days at this point. All similar issues I have seen people experience have had to be fixed by Apple's engineering department.
I am running Catalina. Does not make a difference what OS I use or what web browser I am in. Still does the same thing. My ticked it still open with Apple. It is pushing three weeks. About once a week they ask me to so some irrelevant task like use a different browser or send a diagnostic text file that I had already sent. Seems like they want to blame my device. Frustrating, since everything clearly points to their iCal server.
Try - Get Support.
What browser are you using? Have you tried another browser?
Yes. Same thing on Safari and Chrome. It must be server side. None of m calendars sync. iPhone, iPad or MBP.
iCal "CANNOT LOAD STARTUP DATA"
