Mac Calendar "Server responded with an error" message

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.

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

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.

It appears my calendars are now working correctly, as of about 9:00am CST all Google Calendars are syncing again and server error has disappeared. Problem started a couple of days ago and all fix suggestions in this discussion were tried, but failed. Looks like somebody on the server side got on this and resolved it.

2019 MacBook Pro 16" , Big Sur 11.2.1

well.. it was fixed earlier in the day for me but now its busted again... I did nothing to fix it earlier.. so server side issue.. I'm in the DC area behind Verizon.. anyone else in same area or provider? again wondering if it is rolling over with either service load balancing or capacity issues during certain times of the day..

I have this problem too. I worked on it for hours one time a few weeks ago and ended up moving everything scheduled within the past 2 weeks into a shared google calendar belonging to a different account, then moving them back one by one. It was a problem with a single calendar event :(

Exact same problem. Error line on the Console is pasted below. For me, this error shows up till around 12 PM India time everyday (only in the mornings). After approximately noon, it goes away and calendar syncs perfectly without issues for the rest of the day. Error comes back again next day in the mornings. Every day

default 10:15:34.254926+0530 CalendarAgent [com.apple.calendar.store.log.caldav.queue] [Account refresh failed with error: Error Domain=CoreDAVHTTPStatusErrorDomain Code=403

No idea how to solve this yet.

Not only does the suggested fix available elsewhere (to delete the cache files and rebuild the calendar) stop working after a few hours, but when the calendar was rebuilt, all my meetings in other time zones were reset to my time zone. So don't rebuild your calendar if you don't want to lose all the time zone information in all your meetings (VERY annoying, I have to go into each meeting and fix it now!)

Also, this is only on my MacBook. My iPhone is synching fine.

rawsaxy, as I posted earlier, some of us have talked to humans at Google... even tier-2 and tier-3 people. So far they said they're aware of this user issue, but they looked at it on their end and everything looks normal as far as their servers` configuration and performance.

I slightly lean in that direction too (placing the responsibility with Apple), because other calendar apps like BusyCal and Fantastical work perfectly.

Indeed, I urge everybody to contact Apple support - especially if you have an enterprise account - as well as media outlets like Engadget and ArsTechnica. Or drop $10K on a WSJ ad. ;-)

This must be a recent issue as I have not experienced it before on all my Google accounts (at once). I believe it is isolated with Google Calendars <-> Apple Calendar app. My iCloud calendars sync just fine (which is what I expect being in the Apple eco-system). I have three Google accounts (personal, family, and work) that are all experiencing this "The server responded with an error." message.

I can report it is happening on macOS 10.13.6 (High Sierra) and on macOS 10.15.7 (Catalina)--my two different work MacBook Pros. Every so often the triangle with "!" would disappear only to come back random at random times. My iPhone XR (on iOS 14.4) is set to sync to the same calendars and appears to be behaving as well as my iPad Air 2 (on iOS 14.4) when tested with the Google calendar displayed in a web browser.

This is highly irritating as our family planning calendar is sitting on our Google account and has worked well until recently.

Based on some of you who contributed to this thread, I looked at FantasiCAL and would not mind paying a one time price for the software, but it looks like it has gone the way of monthly subscription. I tried setting up the FREE version only to discover that any view (daily, weekly, monthly, yearly) indicated PREMIUM was required. I found this odd as I just want a basic calendar that syncs.

Same here. Shows up on my desktop but not on any other device. I'm running 11.2.1. I'm getting 2 messages: "The server responded with an error" and "Your calendar couldn't be refreshed. Access to account "(my email which goes through google)" is not permitted. The server responded: "403" to operation CalDAVAccountRefreshQueuableOperation." It's been happening for 2-3 days. Called Apple, they can't help and don't even seem to know what to do. I told them about this discussion and others and they say it's Google's problem.

Hi - My workaround was to create a Chrome-based offline backup to use when Apple calendar goes down -- go to calendar.google.com on Chrome browser, then preferences, then preferences (upper right gear), then scroll to the very bottom and click on offline calendar.

Not sure how this would work if it syncs during the day and loses sync at night as many of us have noticed. Did you verify yours still syncs after calendar refreshes? Make sure you check day and night time sync doesn't change. Let us know. Thanks.

Having thought that IOS was impacted by this - I noticed last night (prior to 9pm NZST) that there was a little exclamation mark next to the word "Calendars" at the bottom of the normal view in the apple Calendar App on IOS. Sure enough, when I clicked on it it took me to my list of calendars and the google ones had a message about the server. (currently ok so can't confirm exact message)

All came right at 9pm - same as MacOS

So basically throughout the day I am adding events to MacOS and IOS and they are all syncing up at 9pm, no action required.

I enabled logs and still could not find anything - then the problem went away (as of 11:00 pm PST) . I'm sure it will come back later / the next day. It's almost like someone is playing with an on/off switch somewhere...

Suggestion to others who are facing this issue - don't do anything - quit the calendar - and check later. Not worth removing and adding accounts. This is just a time based issue. Someone (Google Calendar API or Apple iCal ) needs to fix this.