Issue:

We have upgraded our netscalers to 13.0 84 version from 12.1. On RfwebUI theme for Citrix gateway VIP URL, the URL opens as expected but when users login, it immediately throws an error on screen “Cannot complete your request”

On default theme (black theme), after users enters their credentials and click signin, it says Http/1.1 Internal Server Error 43531

Solution:

We had classic policies on 12.1 version. For session policy, we had REQ.HTTP.HEADER User-Agent NOTCONTAINS CitrixReciever && REQ.HTTP.HEADER Referer EXISTS

Changed the expression to below and it resolved the issue.

REQ.HTTP.HEADER User-Agent NOTCONTAINS CitrixReciever