Dungeon Exception

[15:49:22 WARN]: [MythicDungeons] Task #2335488 for MythicDungeons v1.3.1-SNAPSHOT generated an exception
java.lang.NullPointerException: Cannot invoke "net.playavalon.mythicdungeons.api.parents.DungeonDifficulty.getNamespace()" because the return value of "net.playavalon.mythicdungeons.dungeons.Instance.getDifficulty()" is null
        at net.playavalon.mythicdungeons.dungeons.conditions.ConditionDifficulty.check(ConditionDifficulty.java:33) ~[MythicDungeons-1.3.1-SNAPSHOT.jar:?]
        at net.playavalon.mythicdungeons.api.parents.DungeonTrigger.checkConditions(DungeonTrigger.java:165) ~[MythicDungeons-1.3.1-SNAPSHOT.jar:?]
        at net.playavalon.mythicdungeons.api.parents.DungeonTrigger$1.run(DungeonTrigger.java:229) ~[MythicDungeons-1.3.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_20_R3.scheduler.CraftTask.run(CraftTask.java:101) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at org.bukkit.craftbukkit.v1_20_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:482) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1643) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:450) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1522) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1217) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:320) ~[pufferfish-1.20.4.jar:git-Pufferfish-46]