[18:55:54 WARN]: [ProjectKorra] Task #8 for ProjectKorra v1.5.1 generated an exc
eption
java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Coll
ection;
at com.projectkorra.ProjectKorra.chiblocking.ChiblockingManager.run(Chib
lockingManager.java:18) ~[?:?]
at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftTask.run(CraftTask.java
:53) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:345) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks
]
at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:5
87) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:2
50) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:5
45) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java
:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6
17) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
And repeat this