Android Question Failed resolution of: Landroid/support/v4/view/ViewConfigurationCompat

I'm going nuts with this. I had to re-install everyting and can't get back to work. Since two days I'm trying to fix this.
my paths says:
java exec: C:\Java\jdk-11.0.1\bin\javac.exe
android jar: C:\Android\platforms\android-28\android.jar
This is what I have used before so everything should be the same.
What is missing?

--------- beginning of crash
--------- beginning of main
--------- beginning of system
Copying updated assets files (42)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/view/ViewConfigurationCompat;
at com.jeremyfeinstein.slidingmenu.lib.CustomViewAbove.initCustomViewAbove(CustomViewAbove.java:167)
at com.jeremyfeinstein.slidingmenu.lib.CustomViewAbove.<init>(CustomViewAbove.java:157)
at com.jeremyfeinstein.slidingmenu.lib.CustomViewAbove.<init>(CustomViewAbove.java:152)
at com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.<init>(SlidingMenu.java:209)
at com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.<init>(SlidingMenu.java:192)
at com.jeremyfeinstein.slidingmenu.lib.SlidingMenu.<init>(SlidingMenu.java:181)
at anywheresoftware.b4a.objects.SlidingMenuWrapper.Initialize(SlidingMenuWrapper.java:26)
at andxsvc.com.main$ResumableSub_Activity_Create.resume(main.java:694)
at andxsvc.com.main._activity_create(main.java:436)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
at andxsvc.com.main.afterFirstLayout(main.java:104)
at andxsvc.com.main.access$000(main.java:17)
at andxsvc.com.main$WaitForLayout.run(main.java:82)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:237)
at android.app.ActivityThread.main(ActivityThread.java:8016)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1076)
Caused by: java.lang.ClassNotFoundException: android.support.v4.view.ViewConfigurationCompat
... 25 more
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = true **
** Service (starter) Destroy (ignored)**