Sorry I was mistaken about the roblox cookie, that is a useful error message! I assume you’ve put it back how it was.
Does the log now show a starting up message, which gets repeated every few seconds? With no error message? This could be from the app running to completion and then exiting, to be auto started again by the start script settings.
You can check this by opening the terminal and entering
If it exits back to the prompt then it is running once and not persisting.
To make it keep running while the project is active, one option is to have it listen for a web request, by adding a listener similar to https://glitch.com/~hello-express (the default node express app).
If it doesn’t exit back to the prompt, you can force it to exit with Control-C.