Realm PermissionManager issue

ProjectsActivity.java

/*
 * Copyright 2018 Realm Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.realm.todo;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

import io.realm.ObjectServerError;
import io.realm.PermissionManager;
import io.realm.Realm;
import io.realm.RealmResults;
import io.realm.SyncUser;
import io.realm.permissions.Permission;


/*
* For simplicity the fab button will call pm.getPermissions()
*
* To reproduce:
*
* 1. Open the app and click fab button (getPermissions will called first time)
* 2. Disable wifi and mobile data
* 3. Enable wifi or mobile data
* 4. Click on fab button again (error will thrown)
*
* */

public class ProjectsActivity extends AppCompatActivity {

    private Realm realm;

    private RecyclerView recyclerView;
    private TextView statusView;
    private PermissionManager pm;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_items);

        setSupportActionBar(findViewById(R.id.toolbar));
        recyclerView = findViewById(R.id.recycler_view);
        statusView = findViewById(R.id.status);

        pm = SyncUser.current().getPermissionManager();

        findViewById(R.id.fab).setOnClickListener(view -> {

            pm.getPermissions(new PermissionManager.PermissionsCallback() {

                @Override
                public void onSuccess(RealmResults<Permission> permissions) {

                }

                @Override
                public void onError(ObjectServerError error) {
                    Log.e("getPermissions error", "onError: "+error.getErrorMessage() );
                    showMessage(error.getErrorMessage());
                }
            });

        });

        // Using the current SyncUser identity, we create a subscription for projects created by that user.
        setStatus("Loading...");

    }

    private boolean isValidProjectName(String projectName) {
        return projectName.matches("[a-z0-9]*");
    }

    private void setStatus(String str) {
        statusView.setText(str);
    }

    private void showMessage(String msg) {
        Toast.makeText(ProjectsActivity.this, msg, Toast.LENGTH_LONG).show();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        pm.close();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_items, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.action_logout) {
            SyncUser syncUser = SyncUser.current();
            if (syncUser != null) {
                syncUser.logOut();
                Intent intent = new Intent(this, WelcomeActivity.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                startActivity(intent);
            }
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}