Collectible Card Game Headquarters

As the title already says, I cant launch the Xmage client since it gives me the error message posted below. Any ideas how to fix it? I wasnt successful so far

Dez 26, 2021 9:41:34 PM java.util.prefs.WindowsPreferences <init>
WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
INFO 2021-12-26 21:41:34,095 Starting MAGE client version 1.4.50-V2 (build: 2021-09-05 18:55) =>[main] MageFrame.main
INFO 2021-12-26 21:41:34,097 Logging level: INFO =>[main] MageFrame.main
INFO 2021-12-26 21:41:34,097 Default charset: UTF-8 =>[main] MageFrame.main
FATAL 2021-12-26 21:41:34,380 Critical error on start up, app will be closed: null =>[AWT-EventQueue-0] MageFrame.lambda$main$9
java.lang.ExceptionInInitializerError
at mage.client.MageFrame.<init>(MageFrame.java:213)
at mage.client.MageFrame.lambda$main$9(MageFrame.java:1338)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
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:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
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)
Caused by: java.lang.NullPointerException
at sun.awt.shell.Win32ShellFolder2.access$200(Win32ShellFolder2.java:72)
at sun.awt.shell.Win32ShellFolder2$1.call(Win32ShellFolder2.java:242)
at sun.awt.shell.Win32ShellFolder2$1.call(Win32ShellFolder2.java:237)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Win32ShellFolderManager2.java:556)
at java.lang.Thread.run(Thread.java:748)
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=384m; support was removed in 8.0

hmmmm.....