Villager Optimiser sptting errors into console every couple of minutes

[t0mtee]

Hi, I've recently updated to 1.16.4 and updated the plugins and am getting this error every few minutes:

[19:46:03 WARN]: [VillagerOptimiser] Task #91 for VillagerOptimiser v1.1.5 generated an exception
java.lang.NullPointerException: null
        at org.bukkit.craftbukkit.v1_16_R3.entity.memory.CraftMemoryMapper.fromNms(CraftMemoryMapper.java:46) ~[patched_1.16.4.jar:git-Paper-261]
        at org.bukkit.craftbukkit.v1_16_R3.entity.memory.CraftMemoryMapper.fromNms(CraftMemoryMapper.java:17) ~[patched_1.16.4.jar:git-Paper-261]
        at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_262]
        at org.bukkit.craftbukkit.v1_16_R3.entity.CraftLivingEntity.getMemory(CraftLivingEntity.java:714) ~[patched_1.16.4.jar:git-Paper-261]
        at com.froobworld.avl.utils.ActivityUtils.clearPlaceholderMemories(ActivityUtils.java:173) ~[?:?]
        at com.froobworld.avl.tasks.NormalActivityTask.run(NormalActivityTask.java:19) ~[?:?]
        at com.froobworld.avl.tasks.MainTask.run(MainTask.java:24) ~[?:?]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:99) ~[patched_1.16.4.jar:git-Paper-261]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468) ~[patched_1.16.4.jar:git-Paper-261]
        at net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1296) ~[patched_1.16.4.jar:git-Paper-261]
        at net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:377) ~[patched_1.16.4.jar:git-Paper-261]
        at net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1211) ~[patched_1.16.4.jar:git-Paper-261]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:999) ~[patched_1.16.4.jar:git-Paper-261]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.4.jar:git-Paper-261]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_262]

I'm not sure what is going on.