BUG: POST request 500 error after clicking "Start Trip"

[pcmueller]

• Timer starts correctly, and at the same time the console logs an SMS messaging-related 500 error.
• The error reads: - "POST https://walk-safe-backend.herokuapp.com/sms_messages 500 (Internal Server Error)"
• SMS messaging seems to be working for all contacts other than "Bryan Hohn" - clicking End Trip with "Taylor Andersen" or "Randall Flagg" will log the following message:
• "data":{"id":"47421671750440","type":"sms_message","attributes":{"mobile_number":"+17083630654","message":"Alex has confirmed their trip is completed. Thank you!"}}}