Java Unknown Plugin Error [Help]

Help me I have No idea what this Plugin error is

Code:

20:57:00 [SEVERE] java.io.FileNotFoundException: http://icyrelic.com/afVersion.h
tml
20:57:00 [SEVERE]      at sun.net.www.protocol.http.HttpURLConnection.getInputS
tream(Unknown Source)
20:57:00 [SEVERE]      at java.net.URL.openStream(Unknown Source)
20:57:00 [SEVERE]      at me.icyrelic.com.Updates.checkVersion(Updates.java:16)
 
20:57:00 [SEVERE]      at me.icyrelic.com.PlayerInteract.join(PlayerInteract.ja
va:25)
20:57:00 [SEVERE]      at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown
Source)
20:57:00 [SEVERE]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno
wn Source)
20:57:00 [SEVERE]      at java.lang.reflect.Method.invoke(Unknown Source)
20:57:00 [SEVERE]      at org.bukkit.plugin.java.JavaPluginLoader$1.execute(Jav
aPluginLoader.java:330)
20:57:00 [SEVERE]      at org.bukkit.plugin.RegisteredListener.callEvent(Regist
eredListener.java:62)
20:57:00 [SEVERE]      at org.bukkit.plugin.SimplePluginManager.fireEvent(Simpl
ePluginManager.java:477)
20:57:00 [SEVERE]      at org.bukkit.plugin.SimplePluginManager.callEvent(Simpl
ePluginManager.java:462)
20:57:00 [SEVERE]      at net.minecraft.server.ServerConfigurationManagerAbstra
ct.c(ServerConfigurationManagerAbstract.java:161)
20:57:00 [SEVERE]      at net.minecraft.server.ServerConfigurationManagerAbstra
ct.a(ServerConfigurationManagerAbstract.java:92)
20:57:00 [SEVERE]      at net.minecraft.server.NetLoginHandler.d(NetLoginHandle
r.java:121)
20:57:00 [SEVERE]      at net.minecraft.server.NetLoginHandler.c(NetLoginHandle
r.java:41)
20:57:00 [SEVERE]      at net.minecraft.server.DedicatedServerConnectionThread.
a(DedicatedServerConnectionThread.java:44)
20:57:00 [SEVERE]      at net.minecraft.server.DedicatedServerConnection.b(Sour
ceFile:29)
20:57:00 [SEVERE]      at net.minecraft.server.MinecraftServer.q(MinecraftServe
r.java:583)
20:57:00 [SEVERE]      at net.minecraft.server.DedicatedServer.q(DedicatedServe
r.java:212)
20:57:00 [SEVERE]      at net.minecraft.server.MinecraftServer.p(MinecraftServe
r.java:476)
20:57:00 [SEVERE]      at net.minecraft.server.MinecraftServer.run(MinecraftSer
ver.java:408)
20:57:00 [SEVERE]      at net.minecraft.server.ThreadServerApplication.run(Sour

Please (Almost) Ever time some logins in this happens Its really confusing

 

Same, AuthMe error i think

No critical, server is stable

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Correction this is AntiFreecam error