Calendar Invitation: Response to the invitation cannot be sent

it only clears the problem when I hit delete For all the calendars (Gmail and a work exchange) After i powered down and turned it back on, my calendar was clear, then I went back into Accounts and Passwords, toggled the calendars back on and the calendars resynced. It is a bit nerve racking, but it did work. Now Apple needs to fix the root cause of this problem!

For the IOS 11 replies...

Some of you are are going to settings > calendar.

The advice is to go to settings > accounts and passwords. Under the section for App and Website Passwords, click on the account which is having the Calendar invite issue.

Within that account, you will have the toggle button to turn off the calendar.

Once I did these steps, I power cycled my phone and followed the above steps to re-enable the calendar sync. I am no longer receiving the pop up.

I clicked on the Delete From My iPhone button and it worked just fine. Did not lose my appointments.

thank you so much Jsantos421! This worked on iOS11!

There are no addresses to turn off in the Calendar app on my SE. These calendar error messages have been repeating for several weeks. I turned everything else off in the calendar app, and they persist.

I tried one of my calendars -- and deleted it. It did not sync back up. Fortunately it was a test calendar and I didn't lose anything. I am not going to risk losing my work calendar. I am also tired of the message popping up...

It finally went away... Someone sent me an invitation to attend a meeting and when I responded "Decline," I stopped getting the recurring messages... No problem now. But what happened to cause it?...

I’m having th same issue with recurring pop up invitations. Extra challenge to all of the above posts: this invitation has several monthly recurring calls (two separate invitations set to recur in perpetuity) that I no longer have access to (don’t work there anymore). The account is off of my phone, so it has already been unsynced and account deleted. I’m still getting the pop up (about 7 every time I open my phone just from sleep, and several during use depending on time used will get dozens). Please, please help.

I’ve done everything mentioned above in this thread— accounts deleted, removed the calendar, replied to the invitations decline (they’re bi-monthly recurring calls in perpetuity), updated phone and restarted half a dozen times. Please help, I’m desperate, this issue has been Happening since I left the company in early December... pulling my hair out.

Do you mean we need to click on Delete from My iPhone when that appears after turning off the calendar? I tried just turning the calendar on and off again in settings/accounts and passwords but the pop up came back up. Thank you,

I tried this and it didn't work, and now the pop up comes up about every 10 seconds.

Help!

I have a 6s with iOS 11.2.2

I keep getting “couldn’t reply to calendar invitation “!popping up on my phone how do I get it to stop?

I have 4 accounts syncing to my phone, i cannot afford to remove and re-add all of them, just to have this come back next month. Is there an actual fix for this instead of a work around?

I have an iPhone 7 and this did not work

This works! Thank god and you