Hi Obinna,
Check with other user ids apart from administrator account as well.
This will clarify that the issue does not occur when using Enterprise authentication.
Issue occurs during WIN AD authentication only?
Also, can you try to connect directly to your tomcat url and check if you get this error. This is to rule out issue due to reverse proxy. It might not be the issue, as it works fine for some users. But just to be sure, just check this as well.
if you try to execute the same report via launchpad, do the same user ( with WinAD ) get this error?
or it only occurs on Mobile?
Also, now when you are on 4.3, its working fine
Regards,
Atul B