'Connection needed' after correct credentials entered to TFS connection

Upgraded to v2.24.2, after restart a 'authentication needed' request pops up. 

Entered my data:

Authentication seem to work, I see the list of builds, but after I press "Save", I am back to the main screen which still notes "Authentication needed". 

When I start configuration dialog, "auto-detect settings" is enabled again. As if settings were not stored correctly.

background info: using AzureDevOps, after automatic auth broke around some month ago, used proposed workaround with alternate credentials. Now even this workaround is not working.