Hi, this is a really, super simple (and anti-pattern in many ways) app that i created many months ago.
I decided to distribute it as it is to show the use of Google DistanceMatrix API.
When I tried to load your Snack I got an error about the native-base package. Have you tried using a full Expo project instead of Snack? Or not using native-base?
Your snack is loading for me
I think you just need to declare all of your variables: JoeDistance - Snack
Sorry the error message isn’t more informative!