When your HTML app opens to a blank screen.
Start with a minimal page, then add your content back step by step. These are diagnostic checks, not a guarantee for every website.
Check the input mode
Use Website mode for a hosted site with a server backend. Use HTML for a self-contained page. Uploading a framework's source code does not compile it into a working frontend or bundle its server.
Remove external assumptions
A page may depend on relative files that were never included, an internet connection, an API, or a server route. This release supports HTML content sections, not ZIP folders of assets. Inline the required content or use a hosted HTTPS URL.
Try a minimal page
Create a separate HTML project containing a heading and a paragraph. Build and install it. If that works, add your own styles and scripts gradually to isolate the failing part.
Check the website itself
For Website mode, open the HTTPS address on the Android device. Test authentication and navigation. A site may restrict embedded browsers or rely on browser features that need specific native integration.
Keep the test reproducible
Record input mode, app version, Android version, WebView version, and exact steps. Do not assume a desktop preview proves the installed app behaves the same way.