RS WoodCutter Error Message

Exception in thread "Thread-24" java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
	at java.util.ArrayList$Itr.next(ArrayList.java:859)
	at org.dreambot.api.script.loader.LocalLoader.getAllLocalScripts(LocalLoader.java:192)
	at org.dreambot.0.2.0.2.0.1(0.java:564)
	at org.dreambot.0.2.1.0.0.1.0(1.java:141)
	at java.lang.Thread.run(Thread.java:748)
[INFO] Starting game state listener!
[INFO] Started game state listener!
[INFO] Starting message listener...
[INFO] Started message listener!
Launching Script: Basic Woodcutter: Varrock Tree's
log4j:ERROR No output stream or file set for the appender named [LocalFile].
[INFO] Starting experience listener...
[INFO] Script set to running!
[INFO] Started experience listener!
[ERROR] Exception has occurred while running! Please report error to developer if problem persists:
	java.lang.NullPointerException
	at org.dreambot.core.5.1.0.2.0(2.java:421)
	at org.dreambot.api.wrappers.interactive.GameObject.getModel(GameObject.java:298)
	at org.dreambot.api.wrappers.interactive.GameObject.exists(GameObject.java:358)
	at org.dreambot.api.methods.interactive.Interactables.lambda$all$0(Interactables.java:61)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at org.dreambot.api.methods.interactive.Interactables.all(Interactables.java:61)
	at org.dreambot.api.methods.interactive.Interactables.closest(Interactables.java:107)
	at WoodCutChris.chopTree(WoodCutChris.java:65)
	at WoodCutChris.onLoop(WoodCutChris.java:32)
	at org.dreambot.api.script.AbstractScript.run(AbstractScript.java:256)
	at java.lang.Thread.run(Thread.java:748)