I have Parallels Virtual Automation running on Linux (latest version). I have upgraded my Mac to Mavericks and Safari 7. Since then I can no longer log in to PVA management node (https://PVA_IP:4648). The screen just refreshes, when I hit 'login'.
This behavior has been confirmed as a product bug with internal ID #PVA-33868.
The fix is included into PVA 6.0 update 4. Update the PVA installation in order to fix the problem:
# pva-setup --install