[01:09:37 WARN]: [AJB] Plugin AntiJoinBot v5.0 generated an exception while executing task 23
java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()[Lorg/bukkit/entity/Player;
at org.mcstats.Metrics.postPlugin(Metrics.java:335) ~[?:?]
at org.mcstats.Metrics.access$4(Metrics.java:328) ~[?:?]
at org.mcstats.Metrics$1.run(Metrics.java:223) ~[?:?]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[mc.jar:git-Spigot-93e20b3-31d3159]
at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [mc.jar:git-Spigot-93e20b3-31d3159]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_91]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_91]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_91]