I'm having a similar issue after upgrading from AppMon 7.0 to 7.1.
2018-08-24 19:52:26 UTC WARNING [PermissionManager] Authentication failed for user: jhem
2018-08-24 19:52:26 UTC WARNING [ClientSessionInitializer] Failed to login user 'jhem'
I am able to login using the local admin account, but I can't login using Active Directory users.
Any way to increase verbosity to understand what error is causing this?