Well for one you aren’t casting or checking if the object has the interface first before checking DenyGripping on it, so the result out of that message is invalid (there may be no interface to get a correct result out of for that object). I assume that your object is a GrippableActor so you should be passing the actor reference around not the component (checking for interface between the two would have handled that).
That aside, yeah, I actually had a mistake in my socketing blueprint example and had the pins backwards for the socket one. I fixed the tutorial and re-uploaded corrected images, I also made the snapping images and example be of an actor as usually you will be gripping actors. That one was my bad, I was rushing during that part of the tutorial trying to get the rest of the site up.