TaskManager: Task "firstTask" executed but looks like it's not defined. Make sure "TaskManager.defineTask" is called during initialization phase

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I'm running an EAS app where I have to use Expo-Task-Manager to handle background locations. When my app builds, I get hit with this error:

TaskManager: Task "firstTask" has been executed but looks like it is not defined. Please make 
sure that "TaskManager.defineTask" is called during initialization phase.

Below is my code for executing the Task Manager in my app, but I am struggling to see where I would call it in an "initialization phase."

import * as TaskManager from 'expo-task-manager'
import * as BackgroundFetch from 'expo-background-fetch'
import * as Location from 'expo-location'

const LOCATION_TASK_NAME = 'background-location-task'

useFocusEffect(
    React.useCallback(()=>{

       const requestBackgroundPermissions = async() =>{
       const {status} = await Location.requestBackgroundPermissionsAsync()
         if(status === 'granted'){
           await Location.startLocationUpdatesAsync('firstTask',{
             accuracy: Location.Accuracy.Balanced,
       });
     }
     requestBackgroundPermissions()

    },
    [],
   ),
 )

//Outside of the useFocusEffect

TaskManager.defineTask('firstTask',({data,errror})=>{
    if(error){
      alert('Something went wrong with background locations')
    }
    if(data){
      alert('Something went right with background locations')
      const{locations} = data
    }
})
expo react-native taskmanager javascript ios
1 Answers

So, if you run into this issue, try moving your Task Manager into your App.js file. When the app loads, the Task Manager will be a part of the initialization phase. If you have any issues, feel free to reach out, but it should look something like this:

import React from "react"
import {StyleSheet} from 'react-native'
import * as TaskManager from 'expo-task-manager'
import * as BackgroundFetch from 'expo-background-fetch'
import * as Location from 'expo-location'

const LOCATION_TASK_NAME = 'background-location-task'

TaskManager.defineTask('firstTask',({data,errror})=>{
    if(error){
      alert('Something went wrong with background locations')
    }
    if(data){
      alert('Something went right with background locations')
      const{locations} = data
    }
})

export default function App(){

return <AppFile/>

}
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