.ipa file cannot install in ios devices

Question

I have build an.ipa file from xcode12 through app store distribution. I didn't upload it to app store instead I save it to my disk. The.ipa file was inside a folder. I have uploaded the.ipa file to https://www.iphonecake.com and shared to my Iphone. It showes installing after that the error comes like:

any one have any idea on what might have caused this. Please help me with it.

Answer 1

Unfortunately Apple cancelled all tweaked apps' certificates starting with iOS 14, so devices can't manage the download of.ipa files and it doesn't have a proper solution yet. You can downgrade your phone to iOS 13 and it will work.