This is the app update, change the content of the email is to add a function, use "MFMailComposeViewController" implementation, and the updated information, always reject 2.2, on a real machine test no problem, without which part can't use, there are no "demo," on the app "trials," "beta," or "test" of information,

Apple "is the content of the reply to Your app includes the content or the features that users aren 't able to use in this version", it should be a part of it won't, want to ask, is this email also need to configure something, or have a similar situation, the last is how to solve? High reward,,,

The following content for apple to reply,
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Jan 16, 2021 at 1:57 AM
The From Apple
2. 2 the Performance: Beta Testing
Hello,

Thank you for your resubmission. We noticed that the previous issue from had been resolved.

We are unable to proceed with the review of your app until this issue has had been addressed.

2.2 the Performance Guideline - Beta Testing


Your app includes the content or the features that users aren 't able to use in this version. The Apps that are for individual, trial, or the up - sell purposes are not appropriate for the app Store.

Next Steps

To resolve this issue, both please complete, remove, or fully configure any partially implemented features. Additionally, remove all references To "demo," "trial," "beta," or "test" in your app description, the app icon, screenshots, previews, release notes, and binary.

Resources

If you order a like to conduct a beta trials for app, you may wish to review the TestFlight beta Testing Guide.

We appreciate your efforts to comply with the App Store Review Guidelines, and We are & forward to reviewing your App once these issues are resolved.

Best regards,

App Store Review