Question java.lang.NoClassDefFoundError: Could not initialize class sun.tools.attach.WindowsAttachProvider

I keep getting this error code:

java.lang.NoClassDefFoundError: Could not initialize class sun.tools.attach.WindowsAttachProvider

Anyone know what to do about it?
here is the full text:

[Clouse] Downloaded 1000 human mouse movements selected for you by Clouse.
java.lang.NoClassDefFoundError: Could not initialize class sun.tools.attach.WindowsAttachProvider
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at nul.iiIIIIiiIIiiI.if(cad:117)
at nul.iiIIIIiiIIiiI.if(cad:166)
at nul.iiIIIIiiIIiiI.class(cad:35)
at nul.iiIiIIiiIIiiI.initialize(cvb:15949)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2548)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
at nul.IiIiIiiiiIiIi.if(zy:62)
at nul.IiIiIiiiiIiIi.if(zy:60)
at nul.iiIiIIiiIIiiI.<init>(cvb:6082)
at nul.iiIiIIiiIIiiI.<init>(cvb:23851)
at nul.IIiiIiiIiiiIi.if(lac:29)
at nul.iiIiiiiIiIIii.if(vbc:14513)
at nul.iiIiiiiIiIIii.call(vbc:17303)
at javafx.concurrent.Task$TaskCallable.call(Task.java:1423)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.lang.Thread.run(Thread.java:748)
java.lang.IndexOutOfBoundsException: Index: -1, Size: 0
at java.util.LinkedList.checkElementIndex(LinkedList.java:555)
at java.util.LinkedList.get(LinkedList.java:476)
at nul.IiiIIiiIiIIii.if(vbc:2408)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.concurrent.EventHelper.fireEvent(EventHelper.java:219)
at javafx.concurrent.Task.fireEvent(Task.java:1356)
at javafx.concurrent.Task.setState(Task.java:707)
at javafx.concurrent.Task$TaskCallable.lambda$call$502(Task.java:1453)
at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
at java.lang.Thread.run(Thread.java:748)