One of the user has started getting following error when he tries to access the site:
Sorry this site hasn't been shared with you
He was able to access site before (been able to access for many months but now suddenly getting access error). All other users are able to access the site.
I have checked permission and this user has CONTRIBUTE access (no one has touched permission either and they are like this for many months)
What could be the cause of this issue and where do I look to fix it?
One thing I can try is removing that user from security group and add again but if this doesn't solve the problem then what do I do?
The user is present in that hidden SharePoint user list which can be accessed as follows: