5 Days ago, this .NET CORE web app build pipeline worked:

As of today, a minor update to the branch, with no significant project, nuget, version updates now continuously fails:

The only difference I can detect is on the Build Engine version listed between the two builds -- the failing one is 16.2.xxxxx, whereas the one that worked was 16.0.xxx .
Did something change on the BitBucket end? We have likewise NOT made any YAML changes between these builds/commits.
Perplexed -- can anyone assist?