I found this solution on a reddit thread regarding the issue with the Benchmark not launching, and it actually worked for me!

I had the exact same problem as OP.

After doing some digging it looks like the launcher throws a System.Management.ManagementException when it tries to get the system information. For me, this seems to have been caused by corrupted files in my Windows Management Instrumentation service.

This should fix that:

Run cmd as Administrator

Type "cd wbem" and hit Enter

Type “dir /b *.mof *.mfl | findstr /v /i uninstall > moflist.txt & for /F %s in (moflist.txt) do mofcomp %s” and hit Enter.