Oh the error is being show in gmlive-server.gc.log in "...\AppData\Local\GameMakerStudio2\GMS2TEMP\Dream_6B1657E3_VM\GMLive\gmlive-server.gc.log"
From what I think this probably is GameMaker output. As expected it only occurs either when I press Run or Save the "live" file.
Am I supposed to press Run manually or does I have to click something else to make it live update since the docs said that I only need to press Run.
Anyways what the expected behavior? Will it show "1 client" in the console when it detect there's a game instance running?