It is found that after upgrade from old major version(like 5.0 or 5.5) to latest version of Connections (6.0), Profiles page shows nothing when edit "My Profile"
Old Environment: 5.5, or 5.0
There is no errors in logs on Web page.
One potential cause (most seen) is old customization directly used in new version of Connections.
Shut down Connections Server and remove(backup it first) customization, then test and see if Profiles page works.