What does 'Target - self' make reference to in Level Blueprint?

Eg, Enable/Disable Input function has its Target to ‘self’. Is that referring to player actor?

The Target-self reference in Level Blueprint is the level blueprint itself. I forgot to add that if you don’t use a controller reference in the Enable/Disable Input function, it will enable/disable input to all controllers instead of the default player 0 (which is your first player). So if we go back to your last question, it works because it disabled all inputs from the actor (level) from all controllers that exist. <3

Thanks!

I have one more question. Why doesn’t Disable Input disable WASD even if I have a controller reference?

I can only stab in the dark without any code, but I assume you are disabling your controller input on the Level Blueprint actor, that means your controller input in your character blueprint is still working. You either do that directly in your character or you give a target reference to your character in your level blueprint. <3