I had this exact same issue.  I called support and was on the phone with them for quite some time.  Noting worked.  Eventually they had me re install from scratch by doing the following and it worked.

1. Close ProSeries.
2. Open File Explorer.
3. Browse to the install folder for ProSeries:
   • For ProSeries Stand Alone: C:\ProWinYY
   • For ProSeries Network: C:\ProWinYY
   • For ProSeries Basic: C:\BasWinYY
4. Right-click on the 32bit folder and choose Rename.
5. Add OLD to the end and press enter to rename this to 32bitOLD.
6. Right-click on the Forms folder and choose Rename.
7. Add OLD to the end and press enter to rename this to FormsOLD.
8. Sign in to My Account.
9. From the Dashboard click Download 20YY.
10. Run the install file to replace these two folders.