When you use a single quote in the "App Share Text" (I used "Let's play"), website2apk builder no longer generates an APK. Instead you get a very informative "Build Error Occurred" popup. The popup refers to this URL for "proper resolution": https://websitetoapk.com/forums/3-build-error-signing-error
No mention there that even something simple as a single quote in the App Share Text can fail the build process.
That page does not allow comments, I can't post a note that a single quote in the App Share Text makes the build process fail.
Dear website 2 apk builder engineers: can you please fix this error? I'm pretty sure you forgot to escape single quotes somewhere.