Groups view not working after upgrade to 9.7

Groups view not working after upgrade to 9.7

The groups view does not work anymore when I'm connected through ad auhtentication and being a SuperAdministrator.
The url https://XXX:7272/SuperGroupView.ec?USERNAME=DOMAIN\user&LOGINID=1502 returns a 400 bad request code. If I try the same url by removing the domain it works:
https://XXX:7272/SuperGroupView.ec?USERNAME=user&LOGINID=1502
It only fails when having the SuperAdministrator right.

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