Bukkit

[06:46:21] [Craft Scheduler Thread - 57/WARN]: [GAListener] Plugin GAListener v1.3.2 generated an exception while executing task 62
java.lang.NoSuchMethodError: org.bukkit.Server._INVALID_getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.swifteh.GAL.Metrics.postPlugin(Metrics.java:335) ~[?:?]
at com.swifteh.GAL.Metrics.access$4(Metrics.java:328) ~[?:?]
at com.swifteh.GAL.Metrics$1.run(Metrics.java:223) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-0869666-03f1e37]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-0869666-03f1e37]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_91]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_91]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]

[17:33:04] [Craft Scheduler Thread - 188/WARN]: [GAListener] Plugin GAListener v1.3.2 generated an exception while executing task 62
java.lang.NoSuchMethodError: org.bukkit.Server._INVALID_getOnlinePlayers()[Lorg/bukkit/entity/Player;
	at com.swifteh.GAL.Metrics.postPlugin(Metrics.java:335) ~[?:?]
	at com.swifteh.GAL.Metrics.access$4(Metrics.java:328) ~[?:?]
	at com.swifteh.GAL.Metrics$1.run(Metrics.java:223) ~[?:?]
	at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-0869666-03f1e37]
	at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-0869666-03f1e37]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_91]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_91]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]

after delete config.yml

[20:50:19] [Craft Scheduler Thread - 17/WARN]: [GAListener] Plugin GAListener v1.3.2 generated an exception while executing task 62
java.lang.NoSuchMethodError: org.bukkit.Server._INVALID_getOnlinePlayers()[Lorg/bukkit/entity/Player;
at com.swifteh.GAL.Metrics.postPlugin(Metrics.java:335) ~[?:?]
at com.swifteh.GAL.Metrics.access$4(Metrics.java:328) ~[?:?]
at com.swifteh.GAL.Metrics$1.run(Metrics.java:223) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-b78586d-753a8e7]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-b78586d-753a8e7]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_91]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_91]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]