Agent deployment problems since upgrade to 2020.2

Has anyone else been having issues with agent installations since upgrading to 2020.2? Since then, I've been unable to complete a new agent deployment from the web console successfully. I've had a support ticket open for a month now, and they seem to have few ideas and limited enthusiasm to investigate with me.

If Agents are broken for everyone in 2020.2, I'm surprised not to see any other postings here, unless everyone else gave up a long time ago and is using WMI?