Solve iPhone X calendar invitation not sent problem

From this article, we’ll show you some methods about how to solve iPhone X calendar invitation not sent problem.

After updating iPhone to iOS 11 or iOS 12, many iPhone users feedback that it always pop up message “Calendar Invitation--Your response to the invitation cannot be sent”, and it keeps coming out, so it’s just so annoying. How to fix it? Now follow below tips and get it resolved.

Update iPhone with Latest iOS Version

When your iPhone X is with old iOS version, you can try to update it or update your calendar with its latest version.

Restart iPhone X

Then we can also try to restart iPhone X to have a try.

Step 1. Press volume up button and quickly release it.

Step 2. Press volume down button and quickly release it.

Step 3. Press power button and hold on until Apple logo show up on your screen, and your iPhone X will be open, then check if it still pop up calendar invitation not sent message.

Turn on /off Calendar Account

We can also check our calendar account settings and turn it on / off to have a try.

Step 1. Open iPhone X, go to Setting--Accounts & Password, then click your email account, when you can calendar, click it and turn it off.

Step 2. Then restart your iPhone X, and follow above steps and turn calendar on. And check if the issue still exists.

Restore iPhone with iTunes

When we can also restore our iPhone X with iTunes to fix calendar invitation not sent issue.

Step 1. Launch iTunes, connect your iPhone X with PC. When it’s recognized, click iPhone image icon at the top of left corner.

Step 2. Then click “Restore Backup” button on the right page, and confirm with “Restore”.

Remark: When you lost some calendars on iPhone, or you want to backup your calendars, iRefone is your best choice.

iRefone can not only help us backup and recover calendar data on iPhone iPad but also can help us backup and recover other 16 kinds of files, including contacts, notes, messages, photos, reminders, calendars, call history, WeChat messages ect.

For detailed steps, you can refer to below article for reference:

Retrieve Lost Calendars from iPhone 7 to PC


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