I found some errors...

[AngelCatOwO]

I found some errors...I use MythicMob to spawn mob...

[00:28:20 WARN]: [DungeonsXL] Task #52368 for DungeonsXL v0.11.4 generated an ex
ception
java.lang.ClassCastException: org.bukkit.craftbukkit.v1_8_R3.entity.CraftArrow c
annot be cast to org.bukkit.entity.LivingEntity
at io.github.dre2n.dungeonsxl.sign.ExternalMobSign.setExternalMobs(Exter
nalMobSign.java:281) ~[?:?]
at io.github.dre2n.dungeonsxl.task.ExternalMobSpawnTask.run(ExternalMobS
pawnTask.java:50) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java
:71) ~[spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-d3e0b6f]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:350) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de
12-d3e0b6f]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:7
23) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-d3e0b6f]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:3
74) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-d3e0b6f]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:6
54) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-d3e0b6f]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java
:557) [spigot-1.8.8-R0.1-SNAPSHOT.jar:git-Spigot-db6de12-d3e0b6f]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_91

[Sataniel98]

Thank you for the report, fixed it!