Error on startup

[Andre601]

I don't even know why this happened but it did happen on startup...

>.... [18:08:31 WARN]: [Mortar] Plugin Mortar v1.0.72 generated an exception while executing task 71
java.util.ConcurrentModificationException: null
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) ~[?:1.8.0_212]
at java.util.HashMap$KeyIterator.next(HashMap.java:1469) ~[?:1.8.0_212]
at mortar.lang.collection.GList.<init>(GList.java:108) ~[?:?]
at mortar.lang.collection.GMap.k(GMap.java:125) ~[?:?]
at com.volmit.gloss.controllers.HotloadController.tick(HotloadController.java:53) ~[?:?]
at com.volmit.gloss.controllers.HotloadController.lambda$start$0(HotloadController.java:19) ~[?:?]
at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.14.4.jar:git-Paper-167]
at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[patched_1.14.4.jar:git-Paper-167]
at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.14.4.jar:git-Paper-167]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_212]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_212]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]