videosdk-live / quickstart Goto Github PK

I created this project, but I am getting this exception on a Android Phone.
How can I solve this problem?
Thanks for your help.

D/FlutterWebRTCPlugin( 6143): Create front camera Camera 1, Facing front, Orientation 270 succeeded
I/org.webrtc.Logging( 6143): EglBase14Impl: Using OpenGL ES version 2
D/AndroidRuntime( 6143): Shutting down VM
E/AndroidRuntime( 6143): FATAL EXCEPTION: main
E/AndroidRuntime( 6143): Process: com.example.videosdk_flutter_quickstart, PID: 6143
E/AndroidRuntime( 6143): java.lang.NullPointerException: Attempt to invoke interface method 'void org.webrtc.VideoCapturer.initialize(org.webrtc.SurfaceTextureHelper, android.content.Context, org.webrtc.CapturerObserver)' on a null object reference
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.getUserVideo(GetUserMediaImpl.java:730)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.getUserMedia(GetUserMediaImpl.java:597)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.access$000(GetUserMediaImpl.java:84)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl$1.invoke(GetUserMediaImpl.java:456)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl.lambda$requestPermissions$1(GetUserMediaImpl.java:849)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.GetUserMediaImpl$$ExternalSyntheticLambda0.invoke(Unknown Source:6)
E/AndroidRuntime( 6143): at com.cloudwebrtc.webrtc.utils.PermissionUtils$1.onReceiveResult(PermissionUtils.java:115)
E/AndroidRuntime( 6143): at android.os.ResultReceiver$MyRunnable.run(ResultReceiver.java:50)
E/AndroidRuntime( 6143): at android.os.Handler.handleCallback(Handler.java:873)
E/AndroidRuntime( 6143): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 6143): at android.os.Looper.loop(Looper.java:207)
E/AndroidRuntime( 6143): at android.app.ActivityThread.main(ActivityThread.java:6878)
E/AndroidRuntime( 6143): at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 6143): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
E/AndroidRuntime( 6143): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:876)
I/Process ( 6143): Sending signal. PID: 6143 SIG: 9
Lost connection to device.