Re: Failed to create connection
Hi @Anonymous,
Ok, you could go to the connection center to create a new SharePoint connection:

If it still not work, please log out your account and log in back to check it whether works.
Or you could also try a different browser, Chrome or last version of Microsoft edge.
Best Regards,
Community Support Team _ Lin Tu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.