Logs getting spammed with org.apache.commons.lang.UnhandledException

[DKPeak]

My logs are getting a lot of errors with:

[19:23:58] [Craft Scheduler Thread - 3093/WARN]: Exception in thread "Craft Scheduler Thread - 3093" 
[19:23:58] [Craft Scheduler Thread - 3093/WARN]: org.apache.commons.lang.UnhandledException: Plugin MFHoppers v3.16 generated an exception while executing task 4389742
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
	at org.github.paperspigot.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:23)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NoSuchMethodError: org.bukkit.ChunkSnapshot.getBlockType(III)Lorg/bukkit/Material;
	at net.squidstudios.mfhoppers.tasks.TaskManager$5.run(TaskManager.java:597)
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	... 4 more