[11:52:36] [Head Conversion Thread - 2/WARN]: Couldn't look up profile properties for net.minecraft.util.com.mojang.authlib.GameProfile@2525d563[id=40c14246-d964-34b6-b20e-a56d1bea765c,name=SerbianGamer205,properties={},legacy=false]
net.minecraft.util.com.mojang.authlib.exceptions.AuthenticationException: The client has sent too many requests within a certain amount of time
	at net.minecraft.util.com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:65) ~[spigot.jar:git-Spigot-1543]
	at net.minecraft.util.com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.fillProfileProperties(YggdrasilMinecraftSessionService.java:135) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.TileEntitySkull$1.run(TileEntitySkull.java:105) [spigot.jar:git-Spigot-1543]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_55]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_55]