[00:14:14] [(CommandHelper) async/ERROR]: Uh oh! You've found an error in Core.
This is an error caused while running your code, so you may be able to find a workaround, but is ultimately an error in Core itself.
The line of code that caused the error was this:
@entity = '809a28ee-6bff-40a1-a459-880f27e328f0'
entity_type(@entity)
on or around /home/container/plugins/CommandHelper/LocalPackages/Private/Gear/pioneer_compass.ms:64.
Please report this error to the developers, and be sure to include the version numbers:
Server version: 1.12.1-R0.1-SNAPSHOT;
CommandHelper version: 3.3.2-SNAPSHOT.3281-;
Loaded extensions and versions:
CHPlaceholderAPI (version 0.1.0);
CHVirtualChests (version 1.0.5);
CHFiles (version 2.1.2);
CHNaughty (version 3.7.2);
${project.name} (version 2.1.0);
Core (version 3.3.2);
CHDangerous (version 1.0.2);
Here's the stacktrace:
java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:907)
	at java.util.ArrayList$Itr.next(ArrayList.java:857)
	at org.bukkit.craftbukkit.v1_12_R1.CraftWorld.getEntities(CraftWorld.java:621)
	at com.laytonsmith.abstraction.bukkit.BukkitMCWorld.getEntities(BukkitMCWorld.java:120)
	at com.laytonsmith.core.Static.getEntityByUuid(Static.java:821)
	at com.laytonsmith.core.Static.getEntity(Static.java:802)
	at com.laytonsmith.core.functions.EntityManagement$entity_type.exec(EntityManagement.java:527)
	at com.laytonsmith.core.Script.eval(Script.java:356)
	at com.laytonsmith.core.Script.eval(Script.java:325)
	at com.laytonsmith.core.Script.eval(Script.java:325)
	at com.laytonsmith.core.Script.seval(Script.java:239)
	at com.laytonsmith.core.functions.BasicLogic$_if.execs(BasicLogic.java:84)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.functions.DataHandling$foreach.execs(DataHandling.java:781)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.Script.eval(Script.java:325)
	at com.laytonsmith.core.Script.seval(Script.java:239)
	at com.laytonsmith.core.functions.BasicLogic$_if.execs(BasicLogic.java:85)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.Script.eval(Script.java:325)
	at com.laytonsmith.core.functions.Exceptions$_try.execs(Exceptions.java:172)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.Script.seval(Script.java:239)
	at com.laytonsmith.core.functions.BasicLogic$_if.execs(BasicLogic.java:85)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.functions.DataHandling$foreach.execs(DataHandling.java:781)
	at com.laytonsmith.core.Script.eval(Script.java:315)
	at com.laytonsmith.core.MethodScriptCompiler.execute(MethodScriptCompiler.java:2015)
	at com.laytonsmith.core.MethodScriptCompiler.execute(MethodScriptCompiler.java:1973)
	at com.laytonsmith.core.constructs.CClosure.execute(CClosure.java:187)
	at com.laytonsmith.core.functions.Threading$x_new_thread$1.run(Threading.java:85)
	at java.lang.Thread.run(Thread.java:748)