Hi I am the OP's co-worker and the engineer who wrote the originally code. Here is what I am seeing. We have the permitted identifiers set. The info.plist did lose the refresh background mode setting from my commit to the one that the OP pulled to try this. Using the same device the OP gets the error when scheduling the job on did enter background in the app delegate, on the same code from the repo I have the background task schedule and get a success response I can log.

Hi I filed a ticket in feedback assistant after posting this forum post. The FB number is FB20332393 I included a crash report that was linked in xcode at the time. I will look at generating new data to link to the ticket tomorrow. Thanks James