Hello, I encountered the similar issue. It was working fine in the beginning, until today it stopped working out of sudden.
I was getting signal from my PC which is in the same network on my RevPi by using the RevPi Nodes on my PC NodeRed with RevPi IP address.
As you said this link should solve the issue, does it mean I install the new version of RevPi Nodes server on my RevPi? Because i think i have seen a similar post saying the remote connection on RevPi Nodes is not yet supported.
However, I was getting signal in the beginning until today. Does that mean this is also a bug in the stretch image ?
I will be upgrading to Buster for the RevPi that stopped working, but I do have more RevPis that runs on the stock image(stretch i believe) that are working fine for now. So knowing the cause and solution will definitely help.
Please do let me know if you need more information. Thank you!