[20:48:51 ERROR]: Could not load 'plugins/CommandsChecking-1.1.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/baraban4ik/commandschecking/CommandsChecking has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[server.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:327) ~[server.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [server.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:305) [server.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:205) [server.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:545) [server.jar:git-Spigot-dcd1643-e60fc34]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_301]
Caused by: java.lang.UnsupportedClassVersionError: me/baraban4ik/commandschecking/CommandsChecking has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_301]
at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_301]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_301]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:148) ~[server.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[server.jar:git-Spigot-dcd1643-e60fc34]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_301]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_301]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_301]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_301]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:78) ~[server.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[server.jar:git-Spigot-dcd1643-e60fc34]
... 6 more