"Something went wrong" error
When creating new subsites using the Team Site template, you get a “Something went wrong” error on the new homepage.
There is a known issue with SharePoint which affects creating new subsites using the Team Site template. The new homepage contains a Newsfeed web part displaying a “Something went wrong” error.
We are currently working to address this issue. In the meantime, please remove the Newsfeed web part from the homepage by following these steps from Microsoft.
