12.09 18:19:38 [Server] ERROR Could not load 'plugins/CitizensServerSelector.jar' in folder 'plugins'
12.09 18:19:38 [Server] INFO org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/andrei1058/citizensserverselector/Main has been compiled by a more recent version of the Java Runtime (class file version 56.0), this version of the Java Runtime only recognizes class file versions up to 52.0
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:138) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:337) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:257) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at org.bukkit.craftbukkit.v1_14_R1.CraftServer.loadPlugins(CraftServer.java:355) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:226) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:870) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
12.09 18:19:38 [Server] INFO Caused by: java.lang.UnsupportedClassVersionError: com/andrei1058/citizensserverselector/Main has been compiled by a more recent version of the Java Runtime (class file version 56.0), this version of the Java Runtime only recognizes class file versions up to 52.0
12.09 18:19:38 [Server] INFO at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at java.lang.ClassLoader.defineClass(ClassLoader.java:763) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:135) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:85) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at java.lang.Class.forName0(Native Method) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_212]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:63) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:134) ~[patched_1.14.4.jar:git-Paper-187]
12.09 18:19:38 [Server] INFO ... 6 more