[16:28:21 ERROR]: Could not load 'plugins\SevenKings (1).jar' in folder 'plugins
'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/mi
necraft/server/v1_11_R1/NBTBase
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:133) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:329) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:251) [TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.craftbukkit.v1_10_R1.CraftServer.loadPlugins(CraftServer.j
ava:298) [TEST.jar:git-Spigot-de459a2-51263e9]
        at net.minecraft.server.v1_10_R1.DedicatedServer.init(DedicatedServer.ja
va:203) [TEST.jar:git-Spigot-de459a2-51263e9]
        at net.minecraft.server.v1_10_R1.MinecraftServer.run(MinecraftServer.jav
a:535) [TEST.jar:git-Spigot-de459a2-51263e9]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_111]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_11_R1/NBTBase

        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_111]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_111]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:64) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:129) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        ... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_11_R1.NBTBa
se
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:91) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:86) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_111]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_111]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_111]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:64) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:129) ~[TEST.jar:git-Spigot-de459a2-51263e9]
        ... 6 more