Huggingface Space not working with hello world example

Hello,

Just getting started out and working through creating my first space.
It’s on the free tier and public and none of this seems paticularly complicated because I’m just following the prompts from newly created space (i.e. create the app.py file with the greet function)
However, when I push that file, copied exactly from the prompts, the space never comes up and simply says dcurran90-eterna.hf.space sent and invalid response.
Nothing I do changes this. Occasionally I can see the logs and it says it’s serving the application on 7860. Seems very difficult to debug and kind of strange that this just won’t work no matter what I do. I’ve tried different applications but nothing works.

Just tried and I can get it working locally with docker so it’s not the code or even the image that’s an issue. I tried to see if spectrum was blocking it but that also said it was not blocked. No idea what the problem is or how to debug these things.
Any help would be appreciated

this link works for me

thank you for confirming, radames.
It was spectrum after all. Ended up being kind of a pain but got it working.