I am following the ArcGIS Experience Builder guide here: https://developers.arcgis.com/experience-builder/guide/install-guide/#server-install. And I get to step 9: Open Experience Builder at the following URL
https://localhost:3001/ in your browser. But as soon as I go there in my browser, the form fields are disabled and no information can be entered in.
If I inspect the console and network tabs in the browser, I see a bunch of 404 errors. If I check the terminal window, I do not see any errors or warnings.
I believe that this screen is where the Experience Builder tries to read the settings file from %installation_folder%\server\src\public\signin-info.json
So if the fields are disabled straight after loading the page, I would guess it's related to permissions & security on your file system.. Also, it could be that the ExB tries to reach the internet and fails from some reason.
I abandoned this method entirely lol. I just went with ArcGIS API for JS and did everything via npm. The docs are way better than this Experience Builder thing. Thanks for trying to help though.