I have a User who I have reactivated however he says he cannot login to JIRA, from the user management it shows me he has logged in. He can see the dashboard and board/issue drop downs but says he cant do anything else such as view the boards or create an issue it just buffers. Hes on a Mac-book Air, says he has high speed broadband. Could this possibly be to him being a reactivated user or anything else to do with JIRA?