Porblème logs avec le plugin QuickShop

Bonjour tout le monde,

Je poste ici parce que j'ai un problème avec le Plugin QuickShop qui affiche énormément d'erreur dans les logs de ma console, de façon régulière.
J'ai rencontre des problèmes importants avec mon serveur (rollback...) et j'aimerais me débarasser de ces WARN qui envahissent ma console.

Voici un aperçu des WARN qu'affichent QuickShop régulièrement dans console :

.EntityItem.d()
[12:31:12 WARN]: at java.lang.Class.getMethod(Class.java:1786)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Util.NMS.protect(NMS.java:1 40)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Util.NMS.safeGuard(NMS.java :110)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Shop.DisplayItem.spawn(Disp layItem.java:49)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Shop.DisplayItem.respawn(Di splayItem.java:61)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Shop.ContainerShop.checkDis play(ContainerShop.java:626)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Shop.ContainerShop.isValid( ContainerShop.java:586)
[12:31:12 WARN]: at org.maxgamer.QuickShop.Watcher.ItemWatcher.run(Ite mWatcher.java:40)
[12:31:12 WARN]: at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask .run(CraftTask.java:71)
[12:31:12 WARN]: at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftSche duler.mainThreadHeartbeat(CraftScheduler.java:346)
[12:31:12 WARN]: at net.minecraft.server.MinecraftServer.func_71190_q( MinecraftServer.java:862)
[12:31:12 WARN]: at net.minecraft.server.dedicated.DedicatedServer.fun c_71190_q(DedicatedServer.java:430)
[12:31:12 WARN]: at net.minecraft.server.MinecraftServer.func_71217_p( MinecraftServer.java:798)
[12:31:12 WARN]: at net.minecraft.server.MinecraftServer.run(Minecraft Server.java:658)
[12:31:12 WARN]: at java.lang.Thread.run(Thread.java:745)
[12:31:12 INFO]: Other error
[12:31:13 WARN]: java.lang.NoSuchMethodException: net.minecraft.entity.item.EntityItem.d()
[12:31:13 WARN]: at java.lang.Class.getMethod(Class.java:1786)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Util.NMS.protect(NMS.java:1 40)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Util.NMS.safeGuard(NMS.java :110)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Shop.DisplayItem.spawn(Disp layItem.java:49)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Shop.DisplayItem.respawn(Di splayItem.java:61)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Shop.ContainerShop.checkDis play(ContainerShop.java:626)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Shop.ContainerShop.isValid( ContainerShop.java:586)
[12:31:13 WARN]: at org.maxgamer.QuickShop.Watcher.ItemWatcher.run(Ite mWatcher.java:40)
[12:31:13 WARN]: at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask .run(CraftTask.java:71)
[12:31:13 WARN]: at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftSche duler.mainThreadHeartbeat(CraftScheduler.java:346)
[12:31:13 WARN]: at net.minecraft.server.MinecraftServer.func_71190_q( MinecraftServer.java:862)
[12:31:13 WARN]: at net.minecraft.server.dedicated.DedicatedServer.fun c_71190_q(DedicatedServer.java:430)
[12:31:13 WARN]: at net.minecraft.server.MinecraftServer.func_71217_p( MinecraftServer.java:798)
[12:31:13 WARN]: at net.minecraft.server.MinecraftServer.run(Minecraft Server.java:658)
[12:31:13 WARN]: at java.lang.Thread.run(Thread.java:745)
[12:31:13 INFO]: Other error
[12:31:13 WARN]: java.lang.NoSuchMethodEx