Fitness tracker app error

I just followed the fitness tracker app build on youtube, but testing the finished project with the make it native app I get the following error, does anyone know what is causing this?    An error occurred while executing an action of NativeMobile.Run_NewEdit.actionButton1: null is not an object (evaluating 's.configure') Ce@ u@ P@ f@ y@ C@ callImmediates@ callImmediates@[native code] value@ value@ value@ value@[native code] value@[native code]
1 answers

Check the ‘Start tracker’  JS action in SUB_StartTracker if your configuration is OK. Else the import BackgroundGeolocation from '@mauron85/react-native-background-geolocation'; might fail somewhere?