Help me please (Jar1 file)

[FreshMix]

java.awt.dnd.InvalidDnDOperationException: invalid rejectDrop() at sun.awt.dnd.SunDropTargetContextPeer.rejectDrop(Unknown Source) at java.awt.dnd.DropTargetContext.rejectDrop(Unknown Source) at java.awt.dnd.DropTargetDropEvent.rejectDrop(Unknown Source) at us.deathmarine.luyten.DropListener.drop(DropListener.java:39) at java.awt.dnd.DropTarget.drop(Unknown Source) at sun.awt.dnd.SunDropTargetContextPeer.processDropMessage(Unknown Source) at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchDropEvent(Unknown Source) at sun.awt.dnd.SunDropTargetContextPeer$EventDispatcher.dispatchEvent(Unknown Source) at sun.awt.dnd.SunDropTargetEvent.dispatch(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$500(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

Jar1 file format does not want to open in any of the development environments: Eclipse, Visual Studio Code

[greenozon]

A common practice is to attach your file under issue...

[FreshMix]

How do I solve this problem? I can't open the plugin to understand how it works