¿Puede alguien decirme cuál es el errorenter descripción de la imagen aquí

Aquí está mi código

package com.andisofttechnology.myapplication.Model;

import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v7.app.AppCompatActivity;
        import android.support.design.widget.FloatingActionButton;
        import android.support.design.widget.Snackbar;
        import android.support.v7.widget.LinearLayoutManager;
        import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
        import android.support.design.widget.NavigationView;
        import android.support.v4.view.GravityCompat;
        import android.support.v4.widget.DrawerLayout;
        import android.support.v7.app.ActionBarDrawerToggle;
        import android.support.v7.app.AppCompatActivity;
        import android.support.v7.widget.Toolbar;
        import android.view.Menu;
        import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.TextView;
        import android.widget.Toast;

        import com.andisofttechnology.myapplication.Common.Common;
        import com.andisofttechnology.myapplication.Interface.ItemClickListener;
import com.andisofttechnology.myapplication.R;
import com.andisofttechnology.myapplication.ViewHolder.MenuViewHolder;
        import com.andisofttechnology.myapplication.model.Category;
        import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.database.DatabaseReference;
        import com.google.firebase.database.FirebaseDatabase;
        import com.squareup.picasso.Picasso;

import java.util.Locale;


public class Home extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
FirebaseDatabase database;
DatabaseReference category;
TextView txtFullName;
RecyclerView recycler_menu;
LinearLayoutManager layoutManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Menu");
        setSupportActionBar(toolbar);
        //Init Firebase
        database = FirebaseDatabase.getInstance();
        category = database.getReference("Category");




        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        //Set Name for User
        View headerView = navigationView.getHeaderView(0);
        txtFullName = (TextView)findViewById(R.id.txtFullname);
        txtFullName.setText(Common.currentUser.getName());

        //Load Menu

        recycler_menu = (RecyclerView)findViewById(R.id.recycler_menu);
        recycler_menu.setHasFixedSize(true);
        layoutManager = new LinearLayoutManager(this);
        recycler_menu.setLayoutManager(layoutManager);
        loadMenu();
    }

    private void loadMenu() {
        FirebaseRecyclerOptions<Category> options =
                new FirebaseRecyclerOptions.Builder<Category>()
                        .setQuery(MenuViewHolder, Category.class)
                        .build();


        FirebaseRecyclerAdapter adapter = new FirebaseRecyclerAdapter<Category, MenuViewHolder>(Category.class,R.layout.menu_item,MenuViewHolder.class,category) {

Brother, [07.09.18 01:16]
@Override
            public MenuViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.menu_item, parent, false);
                return new MenuViewHolder(view);
            }

            @Override
            protected void onBindViewHolder(MenuViewHolder holder, int position, Category model) {
                holder.txtMenuName.setText(model.getName());
                Picasso.with(getBaseContext()).load(model.getName()).into(holder.imageView);
                final Category clickItem = model;
                holder.setItemClickListener(new ItemClickListener() {
                    @Override
                    public void onClick(View view, int position, boolean isLongClick) {
                        Toast.makeText(Home.this, ""+clickItem.getName(),Toast.LENGTH_SHORT).show();

                    }
                });
            }


        };
        recycler_menu.setAdapter(adapter);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.home, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
       /* if (id == R.id.action_settings) {
            return true;
        }*/

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

     /*   if (id == R.id.nav_camera) {
            // Handle the camera action
        } else if (id == R.id.nav_gallery) {

        } else if (id == R.id.nav_slideshow) {

        } else if (id == R.id.nav_manage) {

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }*/

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

Gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.andisofttechnology.myapplication"
        minSdkVersion 16
        buildToolsVersion "27.0.1"
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"

    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:26.1.0'
    compile 'com.android.support.constraint:constraint-layout:1.1.3'
    compile 'com.android.support:design:26.1.0'
    testCompile 'junit:junit:4.12'
    //Add Library
    compile 'com.firebaseui:firebase-ui-auth:3.3.1'
    compile 'com.google.firebase:firebase-core:16.0.1'
    compile 'com.google.firebase:firebase-database:16.0.1'
    compile 'info.hoang8f:fbutton:1.0.5'
    compile 'com.rengwuxian.materialedittext:library:2.1.4'
    compile 'com.firebaseui:firebase-ui-database:3.3.1'
    compile 'com.android.support:cardview-v7:26.+'
    compile 'com.android.support:recyclerview-v7:26.+'
    compile 'com.squareup.picasso:picasso:2.5.2'

¿Alguien puede decir cuál es el error en esa línea específica ...................................... .................................................. .................................................. .................................................. ...