Olá, ajudou a resolver o problema ao iniciar o servidor.Instalei o java, mas ainda assim um erro.Custa os erros jdk1.8.0_221 e jdk-11.0.4
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: net/sf/l2j/lo
ginserver/LoginServer has been compiled by a more recent version of the Java Run
time (class file version 55.0), this version of the Java Runtime only recognizes
class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Server have terminated abnormaly.
Server terminated.
Для продолжения нажмите любую клавишу . . .
conselhos de ajuda