[17:31:12 ERROR]: [TerrainControl] Could not set generator for default world 'wo rld_dregora': Plugin 'TerrainControl v2.8.2-SNAPSHOT java.lang.NoClassDefFoundError: net/minecraft/server/v1_11_R1/World at com.khorn.terraincontrol.bukkit.TXPlugin.getDefaultWorldGenerator(TXP lugin.java:134) ~[?:?] at org.bukkit.craftbukkit.v1_12_R1.CraftServer.getGenerator(CraftServer. java:1214) [spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java: 259) [spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.ja va:272) [spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.jav a:544) [spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at java.lang.Thread.run(Unknown Source) [?:1.8.0_51] Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_11_R1.World at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader. java:91) ~[spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader. java:86) ~[spigot-1.12-pre2-SNAPSHOT.jar:git-Spigot-429b0e3-5195487] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_51] at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_51] ... 6 more