Firebase weird error java.lang.ClassNotFoundException: not during development, but after apk released

I've encountered a weird behavior of my App, during development when I run the App on actual device it works perfectly as the result below

but after I release the same App and run on the device, the App crashes many times and becomes dead

as you can see, when visited __Crash Reporting_ option in Firebase console I got this stacktrace which says

====

Exception java.lang.NoClassDefFoundError: Failed resolution of: Lcom/squareup/picasso/Picasso; org.team.asl.connectin.activity.MainActivity$4.onDataChange (MainActivity.java:226) com.google.android.gms.internal.zzbmz.zza () com.google.android.gms.internal.zzbnz.zzYj () com.google.android.gms.internal.zzboc$1.run () android.os.Handler.handleCallback (Handler.java:815) android.os.Handler.dispatchMessage (Handler.java:104) android.os.Looper.loop (Looper.java:194) android.app.ActivityThread.main (ActivityThread.java:5631) java.lang.reflect.Method.invoke (Method.java) java.lang.reflect.Method.invoke (Method.java:372) com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:959) com.android.internal.os.ZygoteInit.main (ZygoteInit.java:754) arrow_drop_down Caused by java.lang.ClassNotFoundException: Didn't find class "com.squareup.picasso.Picasso" on path: DexPathList[[zip file "/data/app/org.team.asl.connectin-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]] dalvik.system.BaseDexClassLoader.findClass (BaseDexClassLoader.java:56) java.lang.ClassLoader.loadClass (ClassLoader.java:511) java.lang.ClassLoader.loadClass (ClassLoader.java:469) org.team.asl.connectin.activity.MainActivity$4.onDataChange (MainActivity.java:226) com.google.android.gms.internal.zzbmz.zza () com.google.android.gms.internal.zzbnz.zzYj () com.google.android.gms.internal.zzboc$1.run () android.os.Handler.handleCallback (Handler.java:815) android.os.Handler.dispatchMessage (Handler.java:104) android.os.Looper.loop (Looper.java:194) android.app.ActivityThread.main (ActivityThread.java:5631) java.lang.reflect.Method.invoke (Method.java) java.lang.reflect.Method.invoke (Method.java:372) com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:959) com.android.internal.os.ZygoteInit.main (ZygoteInit.java:754) 

why is the issue

Exception java.lang.NoClassDefFoundError: Failed resolution of: Lcom/squareup/picasso/Picasso; org.team.asl.connectin.activity.MainActivity$4.onDataChange (MainActivity.java:226) 

UPDATE

the line number 226 of MainActivity is

@Override public void onStart() { super.onStart(); try{ // Add value event listener to the post // [START user_value_event_listener] ValueEventListener userListener = new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { // Get User object and use the values to update the UI mCurrentUser = dataSnapshot.getValue(User.class); // [START_EXCLUDE] Picasso.with(MainActivity.this) // Line number 226 .load(mCurrentUser.getAvatarUrl()) .into(mUserAvatarImageView); mUserNameTextView.setText(mCurrentUser.getUserName()); mUserEmailTextView.setText(mCurrentUser.getEmail()); // [END_EXCLUDE] } @Override public void onCancelled(DatabaseError databaseError) { // Getting User failed, log a message FirebaseCrash.log(databaseError.toException().getMessage()); } }; mCurrentUserDatabaseReference.addValueEventListener(userListener); // [END user_value_event_listener] // Keep copy of post listener so we can remove it when app stops mUserListener = userListener; } catch (Exception e){ FirebaseCrash.log("Message is " + e.getMessage()); } } 

and MultiDex class is

public class EnableMultiDex extends MultiDexApplication { private static EnableMultiDex enableMultiDex; public static Context context; public EnableMultiDex(){ enableMultiDex=this; } public static EnableMultiDex getEnableMultiDexApp() { return enableMultiDex; } @Override public void onCreate() { super.onCreate(); context = getApplicationContext(); FirebaseDatabase.getInstance().setPersistenceEnabled(true); } } 

in AndroidManifest.xml

 <application android:name=".EnableMultiDex" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" .............. 

and whole build.gradle

apply plugin: 'com.android.application' android { compileSdkVersion 25 buildToolsVersion "25.0.2" defaultConfig { applicationId "org.team.asl.connectin" minSdkVersion 21 targetSdkVersion 25 versionCode 1 versionName "0.0.1.2 Beta" multiDexEnabled true } dexOptions { javaMaxHeapSize "4g" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:25.2.0' compile 'com.android.support:support-v4:25.2.0' compile 'com.android.support:design:25.2.0' compile 'com.android.support:recyclerview-v7:25.2.0' compile 'com.android.support:cardview-v7:25.2.0' compile 'com.google.firebase:firebase-database:10.0.1' compile 'com.google.firebase:firebase-storage:10.0.1' compile 'com.google.firebase:firebase-config:10.0.1' compile 'com.google.firebase:firebase-crash:10.0.1' compile 'com.google.firebase:firebase-auth:10.0.1' compile 'com.google.firebase:firebase-common:10.0.1' compile 'com.google.android.gms:play-services-gcm:10.0.1' compile 'com.google.android.gms:play-services-auth:10.0.1' compile 'com.google.android.gms:play-services:10.0.1' compile 'com.android.support:multidex:1.0.1' // FirebaseUI Auth only compile 'com.firebaseui:firebase-ui-auth:1.0.1' compile 'com.firebaseui:firebase-ui-database:1.0.1' /*compile 'com.afollestad.material-dialogs:core:0.9.3.0'*/ compile 'com.github.bumptech.glide:glide:3.6.1' compile 'de.hdodenhof:circleimageview:2.1.0' compile 'me.kareluo.ui:popmenu:1.1.0' compile 'com.android.support.constraint:constraint-layout:1.0.0-beta3' compile 'com.github.jd-alexander:LikeButton:0.2.0' compile 'com.dynamitechetan.flowinggradient:flowinggradient:1.1' compile 'com.github.castorflex.smoothprogressbar:library-circular:1.0.1' compile 'com.daimajia.numberprogressbar:library:1.4@aar' compile 'com.labo.kaji:relativepopupwindow:0.2.1' compile 'com.webianks.library:popup-bubble:1.0.3' compile 'com.zaaach:toprightmenu:1.0' compile 'com.squareup.picasso:picasso:2.5.2' compile 'com.android.support:palette-v7:25.2.0' compile 'com.github.jrvansuita:MaterialAbout:+' compile 'com.github.daniel-stoneuk:material-about-library:1.7.1' compile "com.mikepenz:iconics-core:2.8.2@aar" compile 'com.mikepenz:google-material-typeface:2.2.0.3.original@aar' compile 'com.mikepenz:community-material-typeface:1.7.22.1@aar' compile 'com.github.paolorotolo:appintro:3.4.0' compile 'com.android.support.constraint:constraint-layout:1.0.0-beta3' } apply plugin: 'com.google.gms.google-services' 

ocouring after release and how can I solve this,