LWC warning log

[WARN] Exception in thread "pool-3-thread-204"
[WARN] org.apache.commons.lang.UnhandledException: Plugin LWC v4.5.0-SNAPSHOT generated an exception while executing task 7
at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoSuchMethodError: org.bukkit.Server.getOnlinePlayers()Ljava/util/Collection;
at org.mcstats.Metrics.postPlugin(Metrics.java:335)
at org.mcstats.Metrics.access$400(Metrics.java:57)
at org.mcstats.Metrics$1.run(Metrics.java:223)
at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:53)
at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
... 3 more