Object Reference is not compatible with Bp_door object reference

[Firestorms_pro]

Whenever I connect my bp_door object reference it shows error.

The targetdoor variable is set to object reference as well. Don’t know what should I do now? Working on this error for 4 days in a row now. Please help me out in details. I am tired of this…

[ClockworkOcean]

Drag from the target door reference and search for the ‘pick up key’ node that gives you the little envelope here

Also, to make using interfaces worthwhile, the BP_Door reference needs to be of type ‘actor reference’