[19:44:45 WARN]: [UltimateStacker] Task #1523 for UltimateStacker v1.10.9 generated an exception
java.lang.NullPointerException
        at com.songoda.ultimatestacker.tasks.StackingTask.processEntity(StackingTask.java:152) ~[?:?]
        at com.songoda.ultimatestacker.tasks.StackingTask.run(StackingTask.java:71) ~[?:?]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59) ~[nucleo.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:352) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:783) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]
[19:44:45 WARN]: Could not grab flags from WorldGuard
java.lang.NoSuchMethodException: com.sk89q.worldguard.protection.ApplicableRegionSet.getFlag(java.lang.Object)
        at java.lang.Class.getMethod(Unknown Source) ~[?:1.8.0_221]
        at com.songoda.ultimatestacker.core.hooks.worldguard.WorldGuardFlagHandler.getBooleanFlagLegacy(WorldGuardFlagHandler.java:274) [ultimatestacker-1.10.9.jar:?]
        at com.songoda.ultimatestacker.core.hooks.worldguard.WorldGuardFlagHandler.getBooleanFlag(WorldGuardFlagHandler.java:175) [ultimatestacker-1.10.9.jar:?]
        at com.songoda.ultimatestacker.core.hooks.WorldGuardHook.getBooleanFlag(WorldGuardHook.java:51) [ultimatestacker-1.10.9.jar:?]
        at com.songoda.ultimatestacker.tasks.StackingTask.processEntity(StackingTask.java:219) [ultimatestacker-1.10.9.jar:?]
        at com.songoda.ultimatestacker.tasks.StackingTask.run(StackingTask.java:71) [ultimatestacker-1.10.9.jar:?]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:352) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:783) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [nucleo.jar:git-PaperSpigot-"4c7641d"]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]