You have a ProxySG or Advanced Secure Gateway (ASG) which is unable to join the Windows domain for authentication.
ProxySG or ASG does not authenticate to the domain.
The general approach to gathering data for solving issues with the ProxySG or ASG not being able to join the domain is outlined in this article
Troubleshoot intermittent IWA Direct problems.
Current known issues with the ProxySG or ASG joining the domain: