Can also confirm this issue. I was able to do the following to fix this issue in our environment:
Pre-Upgrade Settings:
- IIS Windows Authorization: Disabled
- appsettings.json : Windows Authorization: false
Post-Upgrade Fix:
- CHANGE IIS Windows Authorization: Enabled
- No change to appsettings.json. Kept Windows Authorization False
I’m using OIDC integrated with Azure for connecting to PSU.