iOS Over the air installation not working - cannot connect to server
According to this answer, any cookies required for authentication are lost during the install process, so the request to download the app (ipa file) will fail. You could try removing authentication for the link to the app, or maybe leaving the app file in Google Drive and see if that works.
Here is how we solved it.
The issue, I was facing was, the hyperlink to manifest.plist and ipa files are behind authentication. Can not access it directly. So our server team bypassed the URL for manifest.plist and .ipa file from the authentication.