21:41:09 [SEVERE] Could not pass event PlayerLoginEvent to GemManager v1.7.1
21:41:09 org.bukkit.event.EventException
21:41:09 	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:299) ~[spigot.jar:git-Spigot-1571]
21:41:09 	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1571]
21:41:09 	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-1571]
21:41:09 	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.PlayerList.attemptLogin(PlayerList.java:400) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.LoginListener.c(LoginListener.java:97) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.LoginListener.a(LoginListener.java:43) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.NetworkManager.a(NetworkManager.java:187) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.ServerConnection.c(ServerConnection.java:81) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:731) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1571]
21:41:09 	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1571]
21:41:09 Caused by: java.lang.IllegalArgumentException: Cannot set to an empty path
21:41:09 	at org.apache.commons.lang.Validate.notEmpty(Validate.java:321) ~[spigot.jar:git-Spigot-1571]
21:41:09 	at org.bukkit.configuration.MemorySection.set(MemorySection.java:163) ~[spigot.jar:git-Spigot-1571]
21:41:09 	at me.br456.Gem.Events.onPlayerLogin(Events.java:70) ~[?:?]
21:41:09 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
21:41:09 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_25]
21:41:09 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
21:41:09 	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
21:41:09 	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:296) ~[spigot.jar:git-Spigot-1571]
21:41:09 	... 13 more