java.lang.UnsupportedClassVersionError: mediathek/Main has been compiled by a more recent version of the Java Runtime (class file version 59.65535), this version of the Java Runtime only recognizes class file versions up to 58.0
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:821)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:719)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:642)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:600)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:80)
	at com.exe4j.runtime.WinLauncher.main(WinLauncher.java:94)
	at com.install4j.runtime.launcher.WinLauncher.main(WinLauncher.java:25)
Uncaught error fetching image:
java.lang.NullPointerException
	at java.desktop/sun.awt.image.URLImageSource.getConnection(URLImageSource.java:101)
	at java.desktop/sun.awt.image.URLImageSource.getDecoder(URLImageSource.java:111)
	at java.desktop/sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:263)
	at java.desktop/sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:212)
	at java.desktop/sun.awt.image.ImageFetcher.run(ImageFetcher.java:176)