Man this is frustrating. I’m having the same issue (4.8) while following a tutorial from Digital tutors. The worst part is I had it working fine on the first run through, but now that I started building off of the First Person template, the controls don’t work at all.
The above is what I’m using to create movement… there are physics thrusters set up around the ship and I activate them (with a force of 20,000) on various key presses however its like the keys aren’t even registering at all. I press a key and nothing activates in the blueprint. No yellow lines, nothing. I also tried 's recommendation of turning on auto-recieve movement but this didn’t work.