A few users are reporting on the Answer Hub and in the Forums that they are getting the following error in their output logs: "Error Provision not found" even though the provision is present and valid in 4.13.1
In the following Forum Post, a user has posted a workaround, however, this did not appear to be necessary in 4.13.0:
1, download your provisioning profile from the Apple Dev site (this appears in the 'Downloads' Folder)
2, In UE4, Project Settings, Platforms, iOS click the Box to 'Import Provision' manually and select the provision in the downloads folder
3, select the recently imported Provision manually with the tick box
4, Package your project
Unable to reproduce in house but see attachments below... Comparing the output log to a screenshot of the Bundle Identifier in the DefaultEngine.ini reveals that a problem is present according to Peter Sauerbrei, who is responding to the user reporting this issue.
Head over to the existing Questions & Answers thread and let us know what's up.