Erreur à l'exécution

Bonjour

j'ai fait une application sous android studio ... ça avançais bien jusqu'au moment ou j'ai cette erreur à l’exécution sur ma tablette connecté en débogage.
L'erreur pointe sur cette ligne, mais je ne vois pas comment corriger le programme.

Si quelqu'un as une idée ?
Code:
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
Merci
Code:
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03 11:24:49.883 24030-24030/com.mochel.mementotechnique E/SysUtils: ApplicationContext is null in ApplicationStatus
01-03 11:24:49.953 24030-24030/com.mochel.mementotechnique E/chromium: [ERROR:browser_gpu_channel_host_factory.cc(258)] Failed to init browser shader disk cache.
01-03 11:24:49.975 24030-24030/com.mochel.mementotechnique E/libEGL: validate_display:255 error 3008 (EGL_BAD_DISPLAY)
01-03 11:24:49.996 24030-24030/com.mochel.mementotechnique E/MPlugin: Unsupported class: com.mediatek.common.telephony.IOnlyOwnerSimSupport
01-03 11:24:50.057 24030-24030/com.mochel.mementotechnique E/MainActivity: Error in creating fragment
01-03 11:24:50.071 24030-24030/com.mochel.mementotechnique E/AndroidRuntime: FATAL EXCEPTION: main
                                                                             Process: com.mochel.mementotechnique, PID: 24030
                                                                             java.lang.VerifyError: Rejecting class com.google.android.gms.internal.zzki because it failed compile-time verification (declaration of 'com.google.android.gms.internal.zzki' appears in /data/app/com.mochel.mementotechnique-1/base.apk)
                                                                                 at com.google.android.gms.appdatasearch.zza.<clinit>(Unknown Source)
                                                                                 at com.google.android.gms.appindexing.AppIndex.<clinit>(Unknown Source)
                                                                                 at com.mochel.mementotechnique.Activite_principale.onCreate(Activite_principale.java:135)
                                                                                 at android.app.Activity.performCreate(Activity.java:6041)
                                                                                 at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111)
                                                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2437)
                                                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2556)
                                                                                 at android.app.ActivityThread.access$800(ActivityThread.java:170)
                                                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1441)
                                                                                 at android.os.Handler.dispatchMessage(Handler.java:111)
                                                                                 at android.os.Looper.loop(Looper.java:194)
                                                                                 at android.app.ActivityThread.main(ActivityThread.java:5568)
                                                                                 at java.lang.reflect.Method.invoke(Native Method)
                                                                                 at java.lang.reflect.Method.invoke(Method.java:372)
                                                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
                                                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)