Calendar Invitation: Your Response To The Invitation Cannot Be Sent

Do you get this iOS Calendar error popup constantly? The error message says: “Calendar Invitation. Your response to the invitation cannot be sent” (see the image below). You tap OK but a few minutes later this pops up again? It is highly likely that you are getting this error because you responded (accept or reject) to a calendar invitation, and your response, for some reasons, could not be sent and thus you keep getting this notification.

Your response cannot be sent

This article explains how you can troubleshoot this error. If you are having this issue as well, this article will help you fix it:

See also: Can’t Remove iOS Apps

Calendar Invitation Error

Please try each fix until you resolve your problem:

  1. On your iOS device, iPad or iPhone, tap Settings > Your Name > iCloud
    1. Toggle off “Calendars”
    2. Wait a few minutes
    3. and then turn “Calendars” back on.iCloud calendars
  2. Update your iPhone to the latest version of iOS software. Here is how:
    1. Tap Settings > General > Software Update and if there is an update available, follow the directions to update your phone.
  3. On your device, tap Settings > Passwords & Accounts
    1. Then select the account (under the accounts section) Note: Select the account that linked with    Calendar (iCloud, Exchange, Gmail etc)
    2.  Slide to turn off “Calendars”. You will be asked to confirm, it will read “Are you sure you want to continue? All calendars will be removed from your iPhone” Tap the red Delete from my iPhone icon to confirm your selection. Do not worry, we will turn this on later and your calendar will sync again.
    3. Now turn off your device (you can do so by going to Settings > General > Shut Down)
    4. Turn your device on
    5. And turn Calendars back on.Turn off calendars
    6. You may want to repeat this process for the other accounts also that you have on your device.
  4. Force close the Calendar app and reopen again. Here is how:
    1. If your device has a Home button then double press the Home button. This action will bring up the most recently used apps. Find the Calendar app (you may swipe right or left). Swipe up to close it. If your device does not have a Home button then swipe up from the bottom of screen and then find the Calendar app and swipe up to force close it. Then reopen it.

Please after each step, check to see if your issue persists.

If you performed all of the troubleshooting steps above, and if you are still experiencing this problem, you may want to contact Apple support. Apple Support offers live chat or Genius bar appointments.


Dr. Serhat Kurt worked as a Senior Technology Director. He holds a doctoral degree (or doctorate) from the University of Illinois at Urbana / Champaign and a master’s degree from Purdue University. Here is his LinkedIn profile.

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67 thoughts on “Calendar Invitation: Your Response To The Invitation Cannot Be Sent”

  1. Hello,
    I followed all the points and I solved.
    My Apple is Iphone XR with outlook calendar .
    Thanks a lot for this useful instruction.

  2. #3 worked.
    My Cloud held my appointments. What a pain. Makes me feel like carrying an appointment calendar again. Too stressful and annoying.

    Grateful for the assistance.


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