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sealing violation: package org.lwjgl.opengl is sealed
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sealing violation: can't seal package com.fazecast.jSerialComm: already loaded
java.lang.SecurityException: sealing violation: package org.lwjgl.opengl is sealed at java.net.URLClassLoader.getAndVerifyPackage(URLClassLoader.java:399) at java.net.URLClassLoader.definePackageInternal(URLClassLoader.java:419) at java.net.URLClassLoader.defineClass(URLClassLoader.java:451) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at com.badlogic.gdx.backends.lwjgl.LwjglGraphics.setVSync(LwjglGraphics.java:557) at com.badlogic.gdx.backends.lwjgl.LwjglCanvas.initialize(LwjglCanvas.java:123) at com.badlogic.gdx.backends.lwjgl.LwjglCanvas.<init>(LwjglCanvas.java:68) at com.badlogic.gdx.tools.hiero.Hiero.<init>(Hiero.java:182) at com.badlogic.gdx.tools.hiero.Hiero$21.run(Hiero.java:1579) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:726) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)