title: What is error? and how to solve
body: <blockquote>
    <p>08-20 18:42:28.284 8769-8769/com.wordpress.prathamesh99wordpress.www.wifiset E/AndroidRuntime: FATAL EXCEPTION: main
                                                                                                   Process: com.wordpress.prathamesh99wordpress.www.wifiset, PID: 8769
                                                                                                   java.lang.RuntimeException: Unable to instantiate application com.android.tools.fd.runtime.BootstrapApplication: java.lang.ClassNotFoundException: Didn't find class "com.android.tools.fd.runtime.BootstrapApplication" on path: DexPathList[[zip file "/data/app/com.wordpress.prathamesh99wordpress.www.wifiset-1/base.apk"],nativeLibraryDirectories=[/data/app/com.wordpress.prathamesh99wordpress.www.wifiset-1/lib/arm, /vendor/lib, /system/lib]]
                                                                                                       at android.app.LoadedApk.makeApplication(LoadedApk.java:680)
                                                                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6395)
                                                                                                       at android.app.ActivityThread.access$1800(ActivityThread.java:229)
                                                                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1887)
                                                                                                       at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                                                       at android.os.Looper.loop(Looper.java:148)
                                                                                                       at android.app.ActivityThread.main(ActivityThread.java:7325)
                                                                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
                                                                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
                                                                                                    Caused by: java.lang.ClassNotFoundException: Didn't find class "com.android.tools.fd.runtime.BootstrapApplication" on path: DexPathList[[zip file "/data/app/com.wordpress.prathamesh99wordpress.www.wifiset-1/base.apk"],nativeLibraryDirectories=[/data/app/com.wordpress.prathamesh99wordpress.www.wifiset-1/lib/arm, /vendor/lib, /system/lib]]
                                                                                                       at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
                                                                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
                                                                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
                                                                                                       at android.app.Instrumentation.newApplication(Instrumentation.java:1005)
                                                                                                       at android.app.LoadedApk.makeApplication(LoadedApk.java:670)
                                                                                                       at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6395) 
                                                                                                       at android.app.ActivityThread.access$1800(ActivityThread.java:229) 
                                                                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1887) 
                                                                                                       at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                                                       at android.os.Looper.loop(Looper.java:148) 
                                                                                                       at android.app.ActivityThread.main(ActivityThread.java:7325) 
                                                                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
                                                                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
                                                                                                    Suppressed: java.io.IOException: No original dex files found for dex location (arm) /data/app/com.wordpress.prathamesh99wordpress.www.wifiset-1/base.apk ()
                                                                                                       at dalvik.system.DexFile.openDexFileNative(Native Method)
                                                                                                       at dalvik.system.DexFile.openDexFile(DexFile.java:295)
                                                                                                       at dalvik.system.DexFile.(DexFile.java:80)
                                                                                                       at dalvik.system.DexFile.(DexFile.java:59)
                                                                                                       at dalvik.system.DexPathList.loadDexFile(DexPathList.java:279)
                                                                                                       at dalvik.system.DexPathList.makePathElements(DexPathList.java:248)
                                                                                                       at dalvik.system.DexPathList.(DexPathList.java:120)
                                                                                                       at dalvik.system.BaseDexClassLoader.(BaseDexClassLoader.java:48)
                                                                                                       at dalvik.system.PathClassLoader.(PathClassLoader.java:65)
                                                                                                       at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:86)
                                                                                                       at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:47)
                                                                                                       at android.app.LoadedApk.getClassLoader(LoadedApk.java:438)
                                                                                                       at android.app.LoadedApk.makeApplication(LoadedApk.java:663)
                                                                                                            ... 9 more
                                                                                                    Suppressed: java.lang.ClassNotFoundException: com.android.tools.fd.runtime.BootstrapApplication
                                                                                                       at java.lang.Class.classForName(Native Method)
                                                                                                       at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                                                                                                       at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                                                                                                       at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
                                                                                                            ... 12 more
                                                                                                    Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available</p>
  </blockquote>