Orbot fails to start with `java.io.FileNotFoundException: armeabi/tor.mp3`

I'm trying to use Orbot on two Android devices. One is a Nexus 9 running stock Android 5.0.2, and the other is a Nexus 6P running the nightly build of CyanogenMod 13 (based on Android 6.0.1), built 12/13/2015. Orbot 15.0.1-RC-3-PIE (Tor 0.2.6.10) is installed from F-Droid on both devices.

When I start Orbot on either of these devices, I get the same exception - something about not being able to find tor.mp3. Here's the log, which is identical on both devices:

checking binary version: null
upgrading binaries to latest version: 0.2.6.10
There was an error installing Orbot binaries
Orbot is starting…
Orbot is starting…
checking binary version: null
upgrading binaries to latest version: 0.2.6.10
Unable to start Tor: java.io.FileNotFoundException: armeabi/tor.mp3
Set background service to FOREGROUND
TorService is shutting down
Orbot is deactivated
Orbot is starting…
Orbot is starting…
checking binary version: null
upgrading binaries to latest version: 0.2.6.10
Unable to start Tor: java.io.FileNotFoundException: armeabi/tor.mp3
Set background service to FOREGROUND
TorService is shutting down
Orbot is deactivated

I suspect what's happening is that both of these devices have newer architectures and for some reason tor.mp3 is getting put in some architecture-specific location. But I'm really not enough of an expert to tell for sure.

Trac:
Username: strugee