<Please see attached file for image>
With17.1 release, there are 2 branding templates CA_Technologies_R7 or CA_Technologies_R7_Full_Screen.
If this branding template is not present against the Business Unit that is being used, then such an issue happens.
To fix this (this can be done in the same Catalog screen as it shows up in the picture above)
1) Select the Administration -> Business Units.
2) Verify if the Business Unit in question has a branding template against it or not (mostly it is empty at the moment).
3) Change this to one of the above templates above.
5) Logout and Login to verify that the issue is now fixed.