Mac Calendar "Server responded with an error" message

Tonight I started getting the error triangle for server error at about 8pm EST and it seem to resolve on its own about 10pm EST. Last night it was a similar start time about 8p or 9p but it continued until I went to bed at about 12 midnight EST.

Hope this helps you guys track down the server issue.

Thanks.

Another up date on the server error times:

I have had error issues as discussed above for several weeks now. These seemed random and none of the fixes suggested worked, including Cache clearing. I did not notice times when it happens until a few days ago, so am starting to keep track. This is happening with three different macs on different hardware and OS X versions. They all go into error mode within a few min of each other.

Monday, 3/1/21 all ok day time, but errors started at about 8pm EST and continued to at least 12 mid.

Tuesday, 1/2/21 all ok all day from 7a to 8p EST, but errors again from 8p-10p. From 10p to 12m all ok again, then more errors at 12 midnight EST

To fix mine just now I opened the calendar, had the triangle obviously.. so I went up top and clicked on calendar, then preferences on the menu bar. I selected the iCloud account and under Accounts I unchecked Enable Account and rechecked it. That did not work. However I have a second Google Account, same email address, that I did the same thing, Unchecked Enable Account, then Rechecked it and it reconnected. I guess we'll see if it happens again.

Same problem, tried every trick mentioned (deleted Google accounts, deleted cookies, forced quit CalendarAgent in Activity Monitor, restarted, added accounts back in, etc). It worked yesterday but suddenly I have the same error again. WTF. I think I might just end up using a new calendar app.

If anyone knows of any free iCal alternatives with the same or even better capabilities, please let me know.

Going into more analysis using logs (In Console - have enabled Calendar http logs) Interesting error observation

[com.apple.calendar.store.log.caldav.http.body] [<?xml version="1.0" encoding="UTF-8"?>

<errors xmlns="http://schemas.google.com/g/2005">

 <error>

  <domain>GData</domain>

  <code>rateLimitExceeded</code>

  <internalReason>Quota exceeded for quota metric 'Queries' and limit 'Queries per day' of service 'caldav.googleapis.com' for consumer 'project_number:946018238758'.</internalReason>

 </error>]

This might be the cause of the issue - I guess some kind of rate limiting is going on at Google's end - so this might be resulting in a seemingly intermittent issue coming up. I don't know if this is being applied to GSuite accounts (or as a while across all accounts - which seems more likely). Am trying out with normal gmail (personal ) to see if this issue occurs there as well.

I have this problem too - iMac (Retina 5K, 27-inch, Late 2015) running Mojave 10.14.6 (18G8022)

As with the others, it's only a problem on my iMac and only a problem with my Gmail calendar.

No problems with other devices or other Gmail services.

I haven't tried fixing it - waiting for a consensus on a solution 😃

So far mine has been working flawlessly since last night just by selecting calendar from the top menu bar with the calendar open, then choose preferences, and Temporarily Uncheck Enable Account on the google account, then Recheck the box and it should reconnect. I closed the calendar completely and reopened it and still have not had the issue since.

I did nothing to my three machines calendars who were all have this issue daily, and since last night about midnight EST, they have all behaved perfectly, updating and syncing once a min. and no errors. Still working flawlessly now almost 24 hrs later. I will probably jinx it by posting this message, but my guess is that Google and Apple have found the issue with the servers and fixed it. I do not think any of the "fixes" that have been posted and all the settings changes did anything at all to fix this problem. I think it was on their server side but intermittent and seemingly time of day related, and hopefully they have now fixed it.

One more follow up. It seems to me that Google/Apple have fixed the issue with no action needed on the user's part. I has been three days now since I last saw the error message on a Google Calendar in the Mac Calendar app. This is on all three of my Macs. Thank you to all who fixed this at the server end. I guess we will never hear a final, "Oh we found the issue and it was X and is fixed now" but well done anyway.

So has this been resolved yet? I upgraded to macOS 10.14.6 recently and now I get the same error and seems nothing is synching with calendar. Shows up on my phone calendar (thankfully for my business) but not my MacBook Air. PAINFUL

Finally! I've had problems with my Google calendars on macOS for years, and it become completely unusable with this persistent error under Big Sur. @David Drahos's solution FINALLY fixed it for me! I did it for both my Google accounts at the same time, and now things finally work. Thanks!

The troubleshooting link does not help with this.

Has anyone been able to resolve this?

Please submit the error here:

https://feedbackassistant.apple.com

That is the only way to get this noticed and fixed.

Update: Well, it's 7:30 PM [EST] and I just got this:

Then, I refreshed the calendars and got this:

The moment the calendars refresh, you'll keep getting this:

Have you found any solution?

I am facing exactly the same issue