Hello @RicoB,
I also happen to have the same problem with Could not connect pins - RenderStream() error. As @Yanjiao_Ao asked, mine version of Unity is 2019.4.6f1 and running from Windows 10 Home edition. I have gone through this topic with the same error from @codetricity , but it hasn’t been solved.
Has there been any aditional work you did with this error that you could share? Thanks