How do I spawn an actor and snap its location to a grid in the middle of Drag & Drop Operation (Widget)?

I am still struggling to get communication established from Widget BP to my Player Control BP. I tried creating an Interface and switch on the boolean by calling interface function from Widget BP and receiving as an event inside Player Control BP. But the problem was that the interface itself is not working and I don’t understand why. My screenshots below


From the WidgetBP, it does not recognise my PlayerControlBP as valid, there even sending the boolean variable through interface is not working


This is the receiving event inside Player Control BP

Sorry, I’m a real noob. Really appreciate your help on this