try the "Troubleshooting error - "This feature requires a Fast Path validation check" portion of this article:
https://proconnect.intuit.com/community/assets/help/how-do-i-fix-the-error-you-must-have-an-active-p...
If that doesn't work, try a clean reinstallation:
https://proconnect.intuit.com/community/multi-user-mode/help/uninstall-rename-and-reinstall-proserie...

If you need to contact customer support. They are open this weekend Sat & Sun 9a-9p EST, and Mon 9a-3a EST