>....=>.... [20:58:22 WARN]: org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/timelord/razetown/RazeTownUpgrades has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
>.... [20:58:22 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:138)
>.... [20:58:22 WARN]: at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:352)
>.... [20:58:22 WARN]: at com.rylinaux.plugman.util.PluginUtil.load(PluginUtil.java:356)
>.... [20:58:22 WARN]: at com.rylinaux.plugman.command.LoadCommand.execute(LoadCommand.java:114)
>.... [20:58:22 WARN]: at com.rylinaux.plugman.PlugManCommandHandler.onCommand(PlugManCommandHandler.java:95)
>.... [20:58:22 WARN]: at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
>.... [20:58:22 WARN]: at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159)
>.... [20:58:22 WARN]: at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchCommand(CraftServer.java:742)
>.... [20:58:22 WARN]: at org.bukkit.craftbukkit.v1_15_R1.CraftServer.dispatchServerCommand(CraftServer.java:704)
>.... [20:58:22 WARN]: at net.minecraft.server.v1_15_R1.DedicatedServer.handleCommandQueue(DedicatedServer.java:469)
>.... [20:58:22 WARN]: at net.minecraft.server.v1_15_R1.DedicatedServer.b(DedicatedServer.java:431)
>.... [20:58:22 WARN]: at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1138)
>.... [20:58:22 WARN]: at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:960)
>.... [20:58:22 WARN]: at java.lang.Thread.run(Thread.java:748)
>.... [20:58:22 WARN]: Caused by: java.lang.UnsupportedClassVersionError: me/timelord/razetown/RazeTownUpgrades has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
>.... [20:58:22 WARN]: at java.lang.ClassLoader.defineClass1(Native Method)
>.... [20:58:22 WARN]: at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
>.... [20:58:22 WARN]: at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
>.... [20:58:22 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:167)
>.... [20:58:22 WARN]: at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100)
>.... [20:58:22 WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
>.... [20:58:22 WARN]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
>.... [20:58:22 WARN]: at java.lang.Class.forName0(Native Method)
>.... [20:58:22 WARN]: at java.lang.Class.forName(Class.java:348)
>.... [20:58:22 WARN]: at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:68)
>.... [20:58:22 WARN]: at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:134)
>.... [20:58:22 WARN]: ... 13 more