[01:25:39] [Server thread/ERROR]: Error occurred while disabling HeavySpleef v1.5.1 (Is it up to date?)
java.lang.NullPointerException
	at de.matzefratze123.heavyspleef.HeavySpleef.onDisable(HeavySpleef.java:167) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323) ~[spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:359) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:424) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:417) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.disablePlugins(CraftServer.java:331) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at net.minecraft.server.v1_8_R1.MinecraftServer.stop(MinecraftServer.java:430) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:561) [spigot-1.8.jar:git-Spigot-edf691c-f48410a]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]