Not able to access CATIA User Community

Hello all,
My team member Saumitra MHATRE (SME52) is not able to access the CATIA User Community. When I tried to share the community with him, I am not able to search his name. I shared the community link with him. When he open the link it keeps on loading and nothing happen after that.
Can some please confirm, what might be the issue and how Saumitra is able to access the community?