Mythic mobs error

[20:35:27] [lumine-scheduler-0/ERROR]: [MythicMobs] [SCHEDULER] Exception thrown whilst executing task
[20:35:27] [lumine-scheduler-0/WARN]: java.util.ConcurrentModificationException
[20:35:27] [lumine-scheduler-0/WARN]:   at java.base/java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:970)
[20:35:27] [lumine-scheduler-0/WARN]:   at java.base/java.util.LinkedList$ListItr.next(LinkedList.java:892)
[20:35:27] [lumine-scheduler-0/WARN]:   at io.lumine.xikage.mythicmobs.mobs.MythicMob.lambda$executeSkills$3(MythicMob.java:1036)
[20:35:27] [lumine-scheduler-0/WARN]:   at io.lumine.xikage.mythicmobs.utils.Delegates$RunnableToSupplier.get(Delegates.java:95)
[20:35:27] [lumine-scheduler-0/WARN]:   at io.lumine.xikage.mythicmobs.utils.promise.LuminePromise$SupplyRunnable.run(LuminePromise.java:653)
[20:35:27] [lumine-scheduler-0/WARN]:   at io.lumine.xikage.mythicmobs.utils.tasks.LumineExecutors$SchedulerWrappedRunnable.run(LumineExecutors.java:71)
[20:35:27] [lumine-scheduler-0/WARN]:   at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[20:35:27] [lumine-scheduler-0/WARN]:   at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[20:35:27] [lumine-scheduler-0/WARN]:   at java.base/java.lang.Thread.run(Thread.java:834)