Finally got a fix.
The Easy fix on this page didn’t cut it. Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows
The quick-fix didn’t patch the Webio.dll and the Winhttp.dll in the Windows-folders. So I went to the update-catalog and downloaded the proper file for my system: Microsoft Update Catalog
Patched,restarted, works.