Giving the message:
"Unable to Verify App
An internet connection is required to verify trust of the developer "iPhone distribution: Kailuan(Group) Limited Liability Corporation". This app will not be available until verified.
I found it in settings, hit "Verify Apps".... nothing changed
update: reinstalling the apps seems to fix this. However this is obviously not an ideal solution, and knowing why it happened would be nice so that I don't have to do this all over again.