Exactly the same issue here. Everything was working fine on June 6, when I did a successful sync with 36.0 release 5. Now the 36.1 and the release 5 don’t work. Not sure why this happened. I’m on Mac 10.15.6
I use serverpilot to create an “App” on google cloud. It worked perfectly.
Connecting with Transmit works. Connecting with Publii gives a connection error and temporarily blocks IP access to the server.