Unable to use my first app

After I successefully developed my first react course and deployed it on netlifly, it stopped working after opening and shows me the errors like Failed to load resource: net::ERR_CONNECTION_REFUSED http://localhost:8080/socket.io/… At the same time it works on localhost:3000 with no errors and warnings.
It is https://priceless-jennings-bbbb19.netlify.app/ deployed yersterday at 3.48 pm.

Thanks in advance for your help,


@freelancelotta Welcome to the Netlify community.

If your web app is looking for assets on localhost, you have a path error in your code.

However, your site seems to load fine without errors. This is what it looks like from my location in Southern California.

Thank you! Yes, it looks the same from my place, but doesn’t allow me to login as well as to sign in to the others. I’ve read about brawser’s Cross-Origin Request problem and a conflict between http:// and https://. I even found something like Acces-Control-Allow-Origin method but have now idea how and where I can use it. Seems it’s my lack of knowleledge. Thanks anyway!