앱 실행시 바로 꺼지는 문제

안녕하세요 현영님 강의 잘보고 있습니다 !
config 설정 하는중에 언제 부터인지 앱을 실행시 바로 종료되는
문제가 생겼습니다.
검색을 해봐도 해결을 못해 질문 드립니다.

안드로이드 스튜디오에서 나오는 에러 로그입니다.

2022-08-04 17:15:31.940 26935-26935/com.fooddeliveryapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.fooddeliveryapp, PID: 26935
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.fooddeliveryapp/com.fooddeliveryapp.MainActivity}: java.lang.ClassCastException: android.app.Application cannot be cast to com.facebook.react.ReactApplication
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7656)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
     Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to com.facebook.react.ReactApplication
        at com.facebook.react.ReactActivityDelegate.getReactNativeHost(ReactActivityDelegate.java:83)
        at com.facebook.react.ReactActivityDelegate.onCreate(ReactActivityDelegate.java:99)
        at com.facebook.react.ReactActivity.onCreate(ReactActivity.java:46)
        at com.fooddeliveryapp.MainActivity.onCreate(MainActivity.java:21)
        at android.app.Activity.performCreate(Activity.java:7994)
        at android.app.Activity.performCreate(Activity.java:7978)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:223) 
        at android.app.ActivityThread.main(ActivityThread.java:7656) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947) 

Caused by 쪽에  at com.fooddeliveryapp.MainActivity.onCreate(MainActivity.java:21)
로그가 있습니다...

항상 좋은 강의 감사합니다 ! 좋은 하루 보내세요 ~ 

android/app/src/main/AndroidManifest.xml 도 한 번 보여주세요.

<application
      android:name=".MainApplication"
부분 코드가 있어야합니다.