Unable to connect to SonarCloud: No such host is known (sonarcloud.io)

The above issue no longer occurs with:

"sonarlint.ls.vmargs": "-Dhttp.proxySet=true -Dhttp.proxyHost=yourProxy -Dhttp.proxyPort=yourProxyPort -Dhttps.proxySet=true -Dhttps.proxyHost=yourProxy -Dhttps.proxyPort=yourProxyPort"

But this issue:

still occurs in version 3.1.0 and with proxy (did not check without it).