[15:20:01 ERROR]: Error occurred while enabling CustomStructures v1.0 (Is it up to date?)
java.lang.NullPointerException
        at com.ryandw11.structure.CustomStructures.loadManager(CustomStructures.java:48) ~[?:?]
        at com.ryandw11.structure.CustomStructures.onEnable(CustomStructures.java:31) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:271) ~[spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugin(CraftServer.java:376) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.enablePlugins(CraftServer.java:326) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at net.minecraft.server.v1_11_R1.MinecraftServer.t(MinecraftServer.java:421) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at net.minecraft.server.v1_11_R1.MinecraftServer.l(MinecraftServer.java:382) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at net.minecraft.server.v1_11_R1.MinecraftServer.a(MinecraftServer.java:337) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:272) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot-1.11.2.jar:git-Spigot-b605b31-f4822eb]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]