[WARNING] java.lang.NoSuchMethodException: org.bukkit.craftbukkit.v1_12_R1.block.CraftCreatureSpawner.getTileEntity()

[WARNING] at java.lang.Class.newNoSuchMethodException(Class.java:562)

[WARNING] at java.lang.Class.throwExceptionOrReturnNull(Class.java:1195)

[WARNING] at java.lang.Class.getMethodHelper(Class.java:1259)

[WARNING] at java.lang.Class.getDeclaredMethod(Class.java:931)

[WARNING] at com.songoda.ultimatestacker.utils.Reflection.updateSpawner(Reflection.java:24)

[WARNING] at com.songoda.ultimatestacker.spawner.SpawnerStack.lambda$setAmount$0(SpawnerStack.java:45)

[WARNING] at com.songoda.ultimatestacker.spawner.SpawnerStack$$Lambda$1336.000000008CFBE740.run(Unknown Source)

[WARNING] at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64)

[WARNING] at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:423)

[WARNING] at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:840)

[WARNING] at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423)

[WARNING] at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774)

[WARNING] at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666)

[WARNING] at java.lang.Thread.run(Thread.java:813)

[WARNING] [UltimateStacker] Task #8777 for UltimateStacker v1.11.12 generated an exception

java.lang.NullPointerException: null

at com.songoda.ultimatestacker.utils.Reflection.updateSpawner(Reflection.java:33) ~[?:?]

at com.songoda.ultimatestacker.spawner.SpawnerStack.lambda$setAmount$0(SpawnerStack.java:45) ~[?:?]

at com.songoda.ultimatestacker.spawner.SpawnerStack$$Lambda$1336.000000008CFBE740.run(Unknown Source) ~[?:?]

at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64) ~[patched_1.12.2.jar:git-Paper-1618]

at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:423) ~[patched_1.12.2.jar:git-Paper-1618]

at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:840) ~[patched_1.12.2.jar:git-Paper-1618]

at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1618]

at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1618]

at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1618]

at java.lang.Thread.run(Thread.java:813) [?:1.8.0_212]