Starting from iOS 14.2 beta 2, the iOS system will check the new and more secure signature format. Users who start an application with an old format signature will be warned, and all devices with applications packaged by systems lower than macOS 1 1 and higher than iOS 14.6 or iOS 15 will prompt that they need to be updated to work properly.

So we need to re-sign the application with a new format.

Solution:

Pack the demo.ipa file, back up the ipa file, and then rename it demo.zip After decompression, you will get the payload folder.

Execute commands in the current directory.

After executing the signed command, execute the command and compress it back.