Selecting "Play Audio" in "All of Grace" crashes Android 6.3.1 App

Any help would be appreciated.

Thread => How to Report a Bug includes request for more information:

• The exact version of the app.
• The make and model of your device.
• The operating system version on your device.
• Detailed steps to reproduce the bug (as specific as possible).
• The language the app is in.
• What happened when the bug occurred? I.e. The app crashed, a book did not display or gave an error message.
• What was expected to happen instead of the bug?
• The function or resource(s) the bug occurred with.
• Any error messages that appeared prior or during the occurrence.
• Network status when the bug occurred.
• Any settings that were changed that may apply.
• Any other additional information you may feel is relevant. (other apps interacting with ours, modified phone settings)

Threads in this forum Mobile Reader Apps (Beta) show 6.3.1 has a build qualifier: e.g. 6.3.1.0487

1. From the Play Store, I see version "6.3.1".  I just checked for updates and there aren't any available
2. Pixel 2
3. 8.1.0 with April 5, 2018 security patch
4. Open "All of Grace: An Earnest Word with Those Who are Seeking" (ie. the text, not the Audio resource) -> Click "Play Audio"
5. English
6. The app exits and I get a "Logos Bible has stopped" error message
7. I would expect the audio to play...
8. "All of Grace: An Earnest Word with Those Who are Seeking" (ie. the text, not the Audio resource)
9. The app exits and I get a "Logos Bible has stopped" error message
10. Wifi is active
11. No relevant settings that I can determine
12. Nothing that I can think of