Caused by:java.lang.UnsupportedClassVersionError:net/minecraft/server/MinecraftServer has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0
Not compatible with Java version.
Caused by:java.lang.UnsupportedClassVersionError:net/minecraft/server/MinecraftServer has been compiled by a more recent version of the Java Runtime (class file version 60.0), this version of the Java Runtime only recognizes class file versions up to 52.0