Q: ical The server responded: “403” to operation CalDAVWriteEntityQueueableOperation., ical The server responded: “403” to operation CalDAVWriteEntityQueueableOperation.

MY EXPERIENCE AND TEMPORARY FIX:

I only recently started expericing this problem and have used iCal for 10 years. 

I'm only seeing this error on a single type of calendar event.  I use it daily for a shift briefing at our flight base:

•  it's non-recurring

•  no alarms

•  no invetees

•  non-mapped location field

But I cut and paste the event regularly, then go back later to add notes.  I don't see this on other events I manually duplicate and I don't see it on individual events I created where I add notes.

Oddly enough, to solve the error, I have to cut my notes and delete the event.  Then one step at a time, I recreate the event (accept), select the calendar type (accept), type the name of the event and location (accept), then paste the notes.

Works without incident.

I'd really rather not do this for all eternity.  I will experiment with adding the notes from my iPhone (using Fantastical because I detest the iOS version) and see if I experience the same error.

MBP 2.3 i7 (quad), 8 GB, SSD, 10.9.1

Interesting.  I'll need to try that with future invites.  Maybe because I accept and change the calendar type all at once, it goes haywire.  Thinking through all the occasions this has gone wrong though, I don't think that's always the case.  Either way, it's worth trying to see if it has some impact.  Thanks!

I have realized that I only get this code when I receive iCal invites from my Fiance's phone a 4, but not from anyone else. 

You are in my brain with that reply!!!  EXACTLY the same experience word for word!  I hate calling clients and saying, yeah, I can't use my calendar, so every single time you change an appointment you set up that I accepted, please email me the time change in addition to changing the calendar invite for the other 10 people, otherwise I'm lost!  Oh yup, that make me look top notch.

hello,

I'm another person with the same problem which started yesterday. I guess we dont' have a solution?

Hi all, I started getting this error message recently too.  It occured when I had a recurring event that I tried to delete, either the current event only or all future events; the result was the same.  What resolved it for me was to close Calendar, then go to System Prefs / iCloud and log out.  I also chose to delete all contacts, calendars, etc. from my Mac when it asked that.  iCloud was fully deleted from my computer.  Then I logged in again and selected all the stuff I wanted synced to iCloud (contacts, calendars, etc.) and then let it restore them all to my computer.  I then opened Calendar again and tried once again to delete the recurring event, this event only and it worked like a charm.  No error messages.  I hope this resolves the issue for some of you.  As has been noted, I think this is a multi-faceted issue.

Sorry, after a while the problem recurred.  I guess this didn't fix it after all.  Sorry

This happened to me recently and I finally solved it (I think) by clearing the Calendar cache.  Instructions can be found here:  http://www.wikihow.com/Clear-the-iCal-Cache

Tried that claring out the cache and now I can't get my calendar back.  Just spent 2 hours on the phone with Apple and still no fix and worse off

Did you make a backup copy of the cache as indicated in the link I mentioned?  If so, you could just revert to the saved copy and things should be just as before.

Yes, but it didn't work.  Apple was able to get it all back, but then they started working on the 403 error again that wasn't resolved through that process, and now it's all gone.  They took it all off the iCloud server in an attempt to clean it up, and now I have nothing.  They said to call back in the morning and see if it resets overnight.  So much for amazing Apple service.  I am livid.  It seems more often than not, I'm better off leaving it all alone and figuring out work arounds.  Whenever Apple tries to "help" they make matters worse and only cost me time and frustration.

I got it fixed?!

Not quite sure what I did exactly but i may have solved the issue (for now?).

When I recall correctly, it went like this:

I stopped Calendar i.e. it was not started/open.

1.

I opened System Preferences -> iCloud;

there i disabled Calendar.

2.

Then I started Calendar;

Went to Preferences -> Accounts, removed my iCloud account.

3.

Then stopped Calendar.

4.

After that I opened  Library (the one only acceassable/viewable under 'Go' menu item, while clicking alt button).

In Library I duplicated the directory 'Calendars' and renamed duplicate directory to 'Calendars-BU'

Then I moved the original 'Calendars' directory to the trash and -safe- emptied the trash. Note the -safe- emptied.

5.

Started 'Calendar',

added iCloud account again (Preferences -> Accounts) - after that somehow it didn't show in the accounts.

So I stopped Calendar again.

Not sure if it then quit by itself or I had to forced it to quit (Apple-Alt-esc quit I mean)

6.

Opened System Preferences -> iCloud and enabled Calendar again.

Started Calendar again and it displayed the messsage that it was in the progress of moving calendars to the server ---- and after that -finally- no more 403 errors.

This does make you suspect that there was some cache issue somehow.

Hope this helps somebody.

Hello, I spent an hour with the Apple tech support and he actually was able to fix it. We had to do various things like disable the calendar sync in icloud, sign out of icloud all together, sign back in, reboot etc. At one point we had to shut down and turn it on in safe mode.  All said and done, it works now. 

Maybe you call support again? I called the EMEA support, nto sure if you are based in the US.

Good luck.

I found a reoccuring event that seemed to be acting strange.  This was trail & error, but once I deleted all future events tied to this daily reoccuring event and then recreated the Dail event.  So far all is well.....

Trial & error