ShareLinkContent on facebook in android

Question

I encountered 1 problem.

Hope everybody help please.

1. I have 1 android application using Facebook sdk. Recently Facebook reported that the app violates policy 4.a, (as attached image), So what should I do next to fix this error?

2. I can't share to facebook using ShareContent, because the dialog appears and then disappears immediately. I received the following error message:

com.facebook.GraphResponse: {HttpStatus: 400, errorCode: 100, subErrorCode: 33, errorType: GraphMethodException, errorMessage: Unsupported get request. Object with ID '17837578*******' does not exist, cannot be loaded due to missing permissions, or does not support this operation. Please read the Graph API documentation at https://developers.facebook.com/docs/graph-api}

Following the path in the Bug log, I use the following function:

GraphRequest request = GraphRequest.newMeRequest(
accessToken,
  new GraphRequest.GraphJSONObjectCallback() {
    @Override
    public void onCompleted(JSONObject object, GraphResponse response) {
      // Insert your code here
    }
});

Bundle parameters = new Bundle();
parameters.putString("fields", "id,name,email");
request.setParameters(parameters);
request.executeAsync();

So what is the

accessToken

here, how to create it?

Thank you everyone for reading.