Mac Calendar "Server responded with an error" message

I am having exact same issue, i have my two google account calendars connected, and it's still showing me:The server responded with an error.

And i have to do the "enable this account" like ten times...

It's very frustrating, even when i can loose event in calendar. It's happening since big sur.

Classic Apple. Clearly an issue, but they fail to acknowledge it until it's resolved...

I have this happening across my iMac (Retina 5K, 27-inch, 2020) v. Big Sur 11.2.1 (20D74) & MacBook Pro (13-inch, M1, 2020) v. Big Sur 11.1

Interestingly, my old iMac from 2011 running Catalina seems OK - and is communicating with the Google Server fine....

Sort it out Apple. This is a disaster for work. I don't want to mess around deleting caches etc.

Same issue. I have 6 Google accounts connected so going down the @daviddrahos path sounds arduous. It would seem something has gone sideways between Apple and Google needing fixing. Please advise ASAP please. Thanks!

It seems that way... Quite shocking that they haven't picked this up day 1 of it starting. It's actually been a problem for around a week now at least...

Can't imagine gmail --> Calendar on Mac is a rare set up for people around the world, so would assume there are thousands of people with this problem...🙄

Sort it out apple!

I've been having the same problem. Started on Thursday and it has been on and off, but always malfunctioning around 6 p.m. PST. Tried clearing the caches and all and still no fix. Hopefully they sort it out

Same here. It's a very big deal for my business right now to not have my Calendars working. At least we can figure it out together. For now I have downloaded the OneCalendar app which seems to import all my various google calendars without problem. This leads me to believe it's 100% an Apple issue and not Google. At least I can see al my cal's in one place with the new app but it sucks compared to the regular app. Can't wait to get a real fix for this.

I also have same issue after update... what is problem?

Is there anyone who solve this?

It occurs again and again I think is is app or server problem.

My ipad and phones are fine but only mac has this problem. Maybe it could be mac problem.

Customers can do nothing :(

Tried all of these steps. After reconnecting accounts, still have same calendar sync error. Also, the static calendar data that was there before is now gone too.

macOS Big Sur 11.2.1 running on MBP 16" 2019. Upgraded about a week ago. Calendar error started a couple of days ago.

Also have a MBA 2012 running Big Sur 11.2 and it too now exhibits same problem.

looked at calendar messages in the error log via console and see a http 403 forbidden error coming back from google.. no further explanation included in that 403 response either.. just rudely disconnects

I'm having the same issue with my new IMAC with the Catalina sysmtem, I think I have tried everything and it's very annoying to synch my Google Calender on Mac, arrrrrg!. Has anyone found how to sort it out?

This made my situation worse. ]8

Now I see my email in the list of calendars, but the actual calendars are missing. I tried Cmd+R several times and I don't get the error anymore, but the calendars are completely missing. Did you run into this?

I will merely add that I'm having this problem as well all of a sudden and nothing I have been able to do has fixed it. It usually resolves itself after a bit but then comes back. Over the years calendar has had many problems. Has anyone had any experience with Fantastical?

I don't think there is an actual fix for this. The people who've achieved a fix probably had some lucky timing. This seems to be more of a server-side issue than a client-side one. The reason it seems that way is because of how widespread it is across different Macs and OS versions. FWIW it seems to only be affecting sync with the Mac. iPhone still seems good. The only thing that deleting caches and all that nonsense did for me was to stop the server error message, but it still doesn't retrieve anything. We're just going to have to wait this one out and use Google Calendar on the browser in the meantime.

Same problem here -- Mac OS 11.2.1 (Big Sur); iPadOS 14.4; iOS 14.4 on my phone.

Problem only occurs on the Mac, not on the iPad or iPhone.

Closing or force-quitting Calendar resolves the problem, but it pops up again, possibly related to te computer going to sleep.

I migrated to iCloud Calendars years ago because sync issues like this had become all too common between Google and Apple. iCloud works brilliantly and I rarely if ever have had any issues with it. Sadly, I still have to sync a few Google calendars that others have shared with me.