After building and running the app from this repo, I encountered the following error:
Mapbox error {losig.myexpomap}[Setup]: loading style failed: Unable to resolve host "api.maptiler.com": No address associated with hostname {"level": "error", "message": "{losig.myexpomap}[Setup]: loading style failed: Unable to resolve host \"api.maptiler.com\": No address associated with hostname", "tag": "Mbgl"}
As a result, the entire screen is black, and no map is displayed.