Sonarscanner for MSBuild fails after server upgrade

I don’t control the management of my SonarQube server and it was recently upgraded to 8.3. I’m running my builds in a windows-based Jenkins server and I upgraded Sonarscanner for MSBuild from 4.6 to 4.9 and the error did not clear. Running VS Build Tools 2019. Since the upgrade I’m getting plugin update error that I assume is related to the server upgrade.

When I run a scan I get the following (verbose) sequence in the log:

18:25:33.718  Processing plugin: csharp version
18:25:33.791  Cache miss: plugin files were not found in the local cache
18:25:33.792  Fetching resource for plugin: csharp, version Resource:
18:25:33.793  Downloading from https://sonarqube[redacted]/static/csharp/ to C:\Users\****\AppData\Local\Temp\.sonarqube\resources\0
18:25:33.794  Downloading file from https://sonarqube.[redacted]/static/csharp/ to C:\Users\****\AppData\Local\Temp\.sonarqube\resources\0\
18:25:33.86  Extracting files to C:\Users\****\AppData\Local\Temp\.sonarqube\resources\0...

Unhandled Exception: System.IO.InvalidDataException: End of Central Directory record could not be found.
   at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()

What appears to be happening is that when sonarscanner reaches out my hosted server and requests /static/csharp/, it’s getting the server’s login page, saving that as the .zip file and then failing to unzip it (because it received html).

Is this something my SQ host messed up in their upgrade by not making the /static directory public? Is there a usual way this is handled? Secondarily, since I can download I’m ok with just adding it to my Jenkins config if someone can point to where the DLLs in that zip file should go.

hi @scott.gentzen, apologies for the very late answer, this went under our radar

did you find a solution to this problem?