Unable to install enterprise app on iOS

We have an enterprise app that we created at our company. As users are updating the new version of iOS 14.2 the app stops working saying it is no longer available.

If it is installed fresh an error pop up saying:
Unable to Install
This app cannot be installed because its integrity could not be verified.

I have checked the certificates in my developer account and they are still valid.
This happened to me also. It was resolved by re-archiving the ipa and having the users redownload it.
No idea why this happened and I updated only the build number - nothing else.
Facing the same issue since 14.2. It still works fine with 14.1.
Any ideas here? I can install the application via an MDM service on some devices and not others. All on 14.4.

Would really love some more insight here. As far as I can tell it is completely random whether or not a device gives this error.

i think after some tests you should change the build version & install url address

Unable to install enterprise app on iOS
 
 
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