Observed on the 17/4/21 via analytics for 1.16.5-2.1:

Stactrace:
bassebombecraft.operator.UndefinedOperatorInputException: bassebombecraft.operator.DefaultPorts$$Lambda$3056/1863980798@3fa622c0 at bassebombecraft.operator.Operators2.validateNotNull(Operators2.java:64) at bassebombecraft.operator.Operators2.applyV(Operators2.java:81) at bassebombecraft.operator.entity.potion.effect.AddEffect2.run(AddEffect2.java:89) at bassebombecraft.operator.Operators2.run(Operators2.java:20) at bassebombecraft.operator.Operators2.run(Operators2.java:39) at bassebombecraft.operator.Sequence2.run(Sequence2.java:71) at bassebombecraft.operator.Operators2.run(Operators2.java:20) at bassebombecraft.event.projectile.ProjectileModifierEventHandler.spawnDecoy(ProjectileModifierEventHandler.java:447) at bassebombecraft.event.projectile.ProjectileModifierEventHandler.handleProjectileImpactEvent(ProjectileModifierEventHandler.java:270) at net.minecraftforge.eventbus.ASMEventHandler_32_ProjectileModifierEventHandler_handleProjectileImpactEvent_ProjectileImpactEvent.invoke(.dynamic) at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) at net.minecraftforge.eventbus.EventBus$$Lambda$2524/490453420.invoke(Unknown Source) at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) at net.minecraftforge.event.ForgeEventFactory.onProjectileImpact(ForgeEventFactory.java:633) at bassebombecraft.entity.projectile.GenericCompositeProjectileEntity.handleImpact(GenericCompositeProjectileEntity.java:339) at bassebombecraft.entity.projectile.GenericCompositeProjectileEntity.func_70071_h_(GenericCompositeProjectileEntity.java:306) at net.minecraft.world.server.ServerWorld.func_217479_a(ServerWorld.java:611) at net.minecraft.world.server.ServerWorld$$Lambda$5720/1102147079.accept(Unknown Source) at net.minecraft.world.World.func_217390_a(World.java:554) at net.minecraft.world.server.ServerWorld.func_72835_b(ServerWorld.java:404) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:851) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:787) at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:78) at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:642) at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:232) at