error in release

2019-08-22 12:55:29.498 1431-2557/? E/WindowManager: win=Window{d280635 u0 com.meetsamplern/com.meetsamplern.MainActivity} destroySurfaces: appStopped=true win.mWindowRemovalAllowed=false win.mRemoveOnExit=false
2019-08-22 12:55:29.726 17565-17683/? E/AndroidRuntime: FATAL EXCEPTION: mqt_native_modules
    Process: com.meetsamplern, PID: 17565
    com.facebook.react.common.JavascriptException: Application App has not been registered.

    Hint: This error often happens when you're running the packager (local dev server) from a wrong folder. For example you have multiple apps and the packager is still running for the app you were working on before.
    If this is the case, simply kill the old packager instance (e.g. close the packager terminal window) and start the packager in the correct app folder (e.g. cd into app folder and run 'npm start').

    This error can also happen due to a require() error during initialization or failure to call AppRegistry.registerComponent.

    , stack:
    runApplication@333:1932
    value@28:3311
    <unknown>@28:822
    value@28:2565
    value@28:794
    value@-1

        at com.facebook.react.modules.core.ExceptionsManagerModule.showOrThrowError(ExceptionsManagerModule.java:54)
        at com.facebook.react.modules.core.ExceptionsManagerModule.reportFatalException(ExceptionsManagerModule.java:38)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
        at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:158)
        at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
        at android.os.Handler.handleCallback(Handler.java:808)
        at android.os.Handler.dispatchMessage(Handler.java:101)
        at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:29)
        at android.os.Looper.loop(Looper.java:166)
        at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:232)
        at java.lang.Thread.run(Thread.java:784)
2019-08-22 12:55:29.799 1431-2010/? E/InputDispatcher: channel 'd280635 com.meetsamplern/com.meetsamplern.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
2019-08-22 12:55:30.379 1431-1981/? E/WindowManager: win=Window{7c9b224 u0 Splash Screen com.meetsamplern EXITING} destroySurfaces: appStopped=false win.mWindowRemovalAllowed=true win.mRemoveOnExit=true