The device is actually an iPhone SE.

Each time I try to run the app, it starts to, then quits. Sometimes it gets so far as to squeak out the beginning of a sound before it quits. The console reports several errors, and a crash report is generated.

The issue seems to have come up around the time that I updated to 1.7.0. It started out just fine, but later began crashing like this.

I've attached a small video describing the events, and the most recent applicable crash log from my device.