component class is not set for "ComponentName"....

[NEYLORXT]

For those who have the same problem with the “Actors components”: component class is not set for “ComponentName” - this component will not be instanced, and additional warnings or errors may occur when compiling blueprint ‘bp third person character’” I have just put a class UMyActorcomponent *ActorComponent;

I don’t know if this will solve your problem, but in my case it did.

[Wizzard033]

I encountered this corruption today with the template BP_TopDownCharacter. I fixed it by duplicating BP_TopDownCharacter and using the duplicated one instead. It was really bizarre. My components from plugins just kept falling off of it after reloading The Editor.