Here is except from the stack trace:

Java stack information for the threads listed above:
> ===================================================
> "Thread-11":
> at java.lang.ClassLoader.loadClass(Unknown Source)
> - waiting to lock <0x22f02aa8> (a sun.plugin2.applet.JNLP2ClassLoader)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> - locked <0x22eebef0> (a sun.plugin2.applet.JNLP2ClassLoader)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at sun.plugin2.applet.JNLP2Manager$4.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
> "thread applet-com.sun.javafx.runtime.adapter.Applet-1":
> at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
> - waiting to lock <0x22eb0ff0> (a com.sun.deploy.security.DeployURLClassPath)
> at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
> at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
> at sun.plugin2.applet.JNLP2ClassLoader.findClass(JNLP2ClassLoader.java:318)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> - locked <0x22f02aa8> (a sun.plugin2.applet.JNLP2ClassLoader)
> at java.lang.ClassLoader.loadClass(Unknown Source)
> at com.sun.javafx.runtime.adapter.Applet.init(Unknown Source)
> at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
> at java.lang.Thread.run(Unknown Source)
> "AWT-EventQueue-2":
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Unknown Source)
> at java.io.ObjectInputStream.resolveClass(Unknown Source)
> at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
> at java.io.ObjectInputStream.readClassDesc(Unknown Source)
> at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
> at java.io.ObjectInputStream.readObject0(Unknown Source)
> at java.io.ObjectInputStream.readObject(Unknown Source)
> at com.sun.deploy.cache.CacheEntry$12.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at com.sun.deploy.cache.CacheEntry.readSigners(Unknown Source)
> at com.sun.deploy.cache.CacheEntry.getCodeSourceCache(Unknown Source)
> at com.sun.deploy.cache.CacheEntry.getCodeSources(Unknown Source)
> at com.sun.deploy.cache.CachedJarFile.getCodeSources(Unknown Source)
> at com.sun.deploy.cache.DeployCacheJarAccessImpl.getCodeSources(Unknown Source)
> at com.sun.deploy.security.CPCallbackHandler$ParentCallback.openClassPathElement(Unknown Source)
> - locked <0x22eb14b0> (a com.sun.deploy.security.CPCallbackHandler$ParentCallback)
> at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$700(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
> - locked <0x22eb0ff0> (a com.sun.deploy.security.DeployURLClassPath)
> at com.sun.deploy.security.DeployURLClassPath.access$100(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$1.next(Unknown Source)
> at com.sun.deploy.security.DeployURLClassPath$1.hasMoreElements(Unknown Source)
> at java.net.URLClassLoader$3$1.run(Unknown Source)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader$3.next(Unknown Source)
> at java.net.URLClassLoader$3.hasMoreElements(Unknown Source)
> at sun.misc.CompoundEnumeration.next(Unknown Source)
> at sun.misc.CompoundEnumeration.hasMoreElements(Unknown Source)
> at sun.misc.CompoundEnumeration.next(Unknown Source)
> at sun.misc.CompoundEnumeration.hasMoreElements(Unknown Source)
> at sun.misc.Service$LazyIterator.hasNext(Unknown Source)
> at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(Unknown Source)
> at javax.imageio.spi.IIORegistry.<init>(Unknown Source)
> at javax.imageio.spi.IIORegistry.getDefaultInstance(Unknown Source)
> at javax.imageio.ImageIO.<clinit>(Unknown Source)
> at com.sun.javafx.tk.desktop.AWTImageLoader.findImageReader(Unknown Source)
> at com.sun.javafx.tk.desktop.AWTImageLoader.readImageFromStream(Unknown Source)
> at com.sun.javafx.tk.desktop.AWTImageLoader.readImage(Unknown Source)
> at com.sun.javafx.tk.desktop.AWTImageLoader.<init>(Unknown Source)
> at com.sun.javafx.tk.swing.SwingToolkit.loadImage(Unknown Source)
> at javafx.scene.image.Image.initialize(Unknown Source)
> at javafx.scene.image.Image.postInit$(Unknown Source)
> at com.sun.javafx.runtime.FXBase.complete$(Unknown Source)
> at reversi.Config$Config$Script.applyDefaults$(Config.fx:13)
> at com.sun.javafx.runtime.FXBase.applyDefaults$(Unknown Source)
> at reversi.Config.<clinit>(Config.fx:1)
> at reversi.Main$Main$Script.initVars$(Main.fx:1)
> at com.sun.javafx.runtime.FXBase.initialize$(Unknown Source)
> at reversi.Main.<clinit>(Main.fx:1)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Unknown Source)
> at com.sun.javafx.runtime.adapter.AppletStartupRoutine.run(Unknown Source)
> at com.sun.javafx.tk.swing.SwingToolkit$StartupRoutine.run(Unknown Source)
> at java.awt.event.InvocationEvent.dispatch(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)
>
> Found 1 deadlock.


Full stack trace is attached.