Problem with nodejs backend

Good morning,
I just deployed my web app made with nextjs and nodejs, my frontend is working fine, but I can’t make any queries on my routes in my backend. do you have any idea what my problem is? a compatibility problem with nodejs?

I attached a copy of my thunderClient request (which works locally and on vercel) but here.

in the netlify project, I just decided to pool the backend and the frontend, that’s why you don’t see a backend address on the screen thunderClient(netlify)

I have the free version of netlify.

Another unrelated question, is netlify compatible with websocket (socket.io)?

Thank you very much for your help on my problem.

Cyril

Where’s your backend hosted?

Not directly, I believe it should be possible with Edge Functions.

Thank you for the answer.
the backend is on netlify

So you’re using another Netlify site as a backend for skyjo-lejeu? Which is this other site then?