[21:41:02 WARN]: [InventoryCritters] Task #228 for InventoryCritters v1.0 generated an exception
java.lang.NullPointerException
        at com.opblocks.inventorycritters.critter.impl.GeneratorCritter.handle(GeneratorCritter.java:35) ~[InventoryCritters_2.jar:?]
        at com.opblocks.inventorycritters.critter.AbstractCritter.lambda$null$6(AbstractCritter.java:206) ~[InventoryCritters_2.jar:?]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.AbstractCritter.lambda$null$7(AbstractCritter.java:204) ~[InventoryCritters_2.jar:?]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.AbstractCritter.lambda$null$8(AbstractCritter.java:202) ~[InventoryCritters_2.jar:?]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.AbstractCritter.lambda$null$9(AbstractCritter.java:200) ~[InventoryCritters_2.jar:?]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.AbstractCritter.lambda$handleUsage$10(AbstractCritter.java:198) ~[InventoryCritters_2.jar:?]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.AbstractCritter.handleUsage(AbstractCritter.java:197) ~[InventoryCritters_2.jar:?]
        at com.opblocks.inventorycritters.critter.impl.GeneratorCritter.lambda$null$0(GeneratorCritter.java:48) ~[InventoryCritters_2.jar:?]
        at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_211]
        at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) ~[?:1.8.0_211]
        at com.opblocks.inventorycritters.critter.impl.GeneratorCritter.lambda$register$1(GeneratorCritter.java:48) ~[InventoryCritters_2.jar:?]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59) ~[PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:352) [PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:783) [PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [PaperSpigot.jar:git-PaperSpigot-"4c7641d1"]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_211]