[19:09:09] [Craft Scheduler Thread - 9/WARN]: [ZeldaHearts] Plugin ZeldaHearts v2.0.2 generated an exception while executing task 134

java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
	at me.mrCookieSlime.CSCoreLib.PluginStatistics.Metrics.postPlugin(Metrics.java:357) ~[?:?]
	at me.mrCookieSlime.CSCoreLib.PluginStatistics.Metrics.access$4(Metrics.java:350) ~[?:?]
	at me.mrCookieSlime.CSCoreLib.PluginStatistics.Metrics$1.run(Metrics.java:245) ~[?:?]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot-1.11.2.jar:git-Spigot-d4f98a3-cb61ac0]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_72]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_72]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]