java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at think.rpgitems.power.PowerTicker.run(PowerTicker.java:15) ~[?:?]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[server.jar:git-Spigot-3fb9445-6e3cec8]
at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:353) [server.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:738) [server.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [server.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [server.jar:git-Spigot-3fb9445-6e3cec8]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [server.jar:git-Spigot-3fb9445-6e3cec8]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]