This sounds like you don’t have your provisions setup for your IPA to build and load on the device.
Check your Project Settings > IOS and make sure that your provisions are properly setup there. You may also want to check your Output Log for any warnings/errors that would be reported there too.
I didn’t want to pay $100 yet for a paid Apple developer account so I was using this method to install the app:
I had previously been able to get this approach to work with earlier versions of xcode and ue4, but something obviously has changed.
I agree with what you’re saying, but after trying various ways to do it without paying for a developer account with Apple I just gave up on this approach, bought an Apple developer account, and used UE4’s official guide to do it. It’s working now.