Why keyboard input doesn't work?

I’m just a newbee. I’m trying to make keyboard enter event.

I’ve placed input node with a keypress ‘J’ event in level blueprint, folowed by a prinstring command, but it
doesen’t do anithing…

Maybe you need to enable input on beginplay.
and getPlayercontroller for it

With something that simple I’d blame the window capture at this point. Does it produce a result if you click in the game window first and then hit J?