We have 3 Global Admins and 2 of the 3 have this problem and the other does not.
When going into Sharepoint online and trying to change the Sharing permissions for the group, we get the following error:
Error on loading page: UntaggedErrorWithStatusCode403: No inner error provided
Error when attempting to change permissions with the slider: UntaggedErrorWithStatusCode403: No inner error provided Access denied. You do not have permission to perform this action or access this resource.
I can't see any other issues like in my google searches.