When Any Image Click The App Closes Automatically ! ? Why

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One of the extension which you are using is not compatible with Android X

java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/view/ViewPager;
	at java.lang.Class.getDeclaredFields(Native Method)
	at gnu.bytecode.ClassType.addFields(ClassType.java:606)
	at gnu.bytecode.ClassType.getFields(ClassType.java:506)
	at gnu.bytecode.ClassType.hasOuterLink(ClassType.java:260)
	at gnu.bytecode.ClassType.getDeclaredMethod(ClassType.java:880)
	at gnu.bytecode.ClassType.addMethod(ClassType.java:667)
	at gnu.bytecode.ClassType.addMethod(ClassType.java:698)
	at gnu.bytecode.ClassType.addMethods(ClassType.java:1009)
	at gnu.bytecode.ClassType.getDeclaredMethods(ClassType.java:725)
	at gnu.bytecode.ClassType.getMethods(ClassType.java:809)
	at gnu.kawa.reflect.ClassMethods.getMethods(ClassMethods.java:106)
	at gnu.kawa.reflect.ClassMethods.apply(ClassMethods.java:229)
	at gnu.kawa.reflect.Invoke.lookupMethods(Invoke.java:278)
	at gnu.kawa.reflect.Invoke.applyN(Invoke.java:185)
	at gnu.mapping.ProcedureN.apply2(ProcedureN.java:39)
	at io.kodular.androlartech.Insta_saver.POST.$define(POST.yail:10250)
	at com.google.appinventor.components.runtime.Form.onCreateFinish2(SourceFile:502)
	at com.google.appinventor.components.runtime.Form.onCreateFinish(SourceFile:446)
	at com.google.appinventor.components.runtime.Form.onCreate(SourceFile:385)
	at android.app.Activity.performCreate(Activity.java:7893)
	at android.app.Activity.performCreate(Activity.java:7880)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1307)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3286)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3460)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2047)
	at android.os.Handler.dispatchMessage(Handler.java:107)
	at android.os.Looper.loop(Looper.java:224)
	at android.app.ActivityThread.main(ActivityThread.java:7590)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.ClassNotFoundException: android.support.v4.view.ViewPager

Recast that extension

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