Having trouble running an iOS project from Xcode

I’m new to Unreal, and I’m having trouble getting the First-Person C++ template to build and launch from Xcode. I am using a Windows machine as my primary dev machine, and I have gotten it to work from that side, packaging and running the game through the editor running on Windows, using Remote Build on my Mac. That part’s pretty slick (nice job!), it works, game boots up on my iPad fine.

However from the Mac itself I can’t get the project to build and run correctly from Xcode 9.2 so that I can debug it. When I try to run the project, it crashes:

Looks like it’s asserting in FICUInternationalization::Initialize(). Does anyone know what additional steps I need so that I can build and debug a project from Xcode?