Error in SharePoint Online when you create a calendar overlay


When you try to create a calendar overlay in Microsoft SharePoint Online by using a calendar from a SharePoint Online subsite, you receive the following error message:

Sorry, something went wrong

An unexpected error has occurred.


To fix this issue, remove the ampersand (&) from the site that contains the calendar from which you want to create the calendar overlay. To do this, follow these steps:

  1. Browse to the site that contains the ampersand in the URL.
  2. Click the gear icon for the Settings menu, and then click Site settings.
  3. In the Look and Feel section, click Title, description, and logo.
  4. Remove the ampersand (&) from the Web Site Address field, and then click OK.
  5. Create the calendar overlay by using the new URL.

More information

This issue occurs when the site that contains the calendar that you're creating the calendar overlay from contains an ampersand (&) in the URL.

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