Accessed none from node/import in scene with blueprint

Ok it’s not solve at all …

I resolve my question to spawn an object … but i realize my problem for variable is not solve …

Cubeblueprint is not assigned in the space automatically

I can’t assign it because it’s not appear in the window

However in my variable, i think it’s correctly assign

I read that i must to use the cast… but i’m not sure it’s like that ? (but it doesn’t work …)

Someone to tell me what i do ? …