[WARNING] .... [NapThe] Plugin NapThe v3.3.1 generated an exception while executing task 2385

java.lang.IllegalStateException: InventoryOpenEvent may only be triggered synchronously.

at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:533) ~[patched_1.14.4.jar:git-Paper-226]

at org.bukkit.craftbukkit.v1_14_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:1196) ~[patched_1.14.4.jar:git-Paper-226]

at org.bukkit.craftbukkit.v1_14_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:1182) ~[patched_1.14.4.jar:git-Paper-226]

at org.bukkit.craftbukkit.v1_14_R1.entity.CraftHumanEntity.openCustomInventory(CraftHumanEntity.java:499) ~[patched_1.14.4.jar:git-Paper-226]

at org.bukkit.craftbukkit.v1_14_R1.entity.CraftHumanEntity.openInventory(CraftHumanEntity.java:374) ~[patched_1.14.4.jar:git-Paper-226]

at com.gmail.vkhanh234.napthe.gui.HistoryGui.load(HistoryGui.java:67) ~[?:?]

at com.gmail.vkhanh234.napthe.gui.HistoryGui.<init>(HistoryGui.java:32) ~[?:?]

at com.gmail.vkhanh234.napthe.NapThe$4.run(NapThe.java:177) ~[?:?]

at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.14.4.jar:git-Paper-226]

at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[patched_1.14.4.jar:git-Paper-226]

at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.14.4.jar:git-Paper-226]

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:813) [?:1.8.0_212]