Many thanks for your emails. I applied a workaround; I built it and then used “yarn run python-devserver” and it’s running fine now for my purpose.
Yes the server was running without frontend assets - I was thinking it is due to that, it was trying to access the assets on localhost (http://localhost:*/**) and I was running it on google compute engine.
However as you mentioned below the ports were not open by default.
Do you think it’s a good idea to check with another install with required ports open on the server?