Symptoms: 

When a customer upgrades WS from 10.4.4 or 10.4.5, a new column, 'userauthenticationtype', is created in the 'users' table in the database. The default value is set to '(null)'. This prevents administrators from changing passwords and/or logging in to WS after upgrade.

Resolution: 

You can fix this issue by deploying the update to WorldServer 10.4.5, available on FTP.

If you cannot deploy it, contact the SDL Support Team:

•     Log on to your "My SDL" Account.
•     Log a support request via Support & Education Support. 

Notes: 

• All systems running WorldServer 10.4.5 should have this hotfix applied.
• The fix for this issue is also available in WS 11.1.1.