Can´t upload next js extension to host test

You should be able to.

You jast have to build it to a static site that can be served by a dumb nginx server. (not by a nodeJS server)

Which according to

Should be

next build and then the contents for .next in your zip file.
Then if your HTML is not loading check your zip is not a zip of a folder of files. Should be a zip of files.
And then if yout HTML is loading but your assets/js/css is not. you’ll need to fix the referneces to those items to by relative links not absolute links.

But I’m not that familiar with next to know for sure.

So the question is, when you

do this.

Whats not working?

Is the upload being rejected?
Is your extension not loading?

Whats not working?