If you have a controller plugged into your PC, it’s most probably what’s causing this. Latest Starfield update broke some controller compatibility things. Try clicking into the game with your mouse first, and then use your controller.
if the above didn’t work, refer to below.
Keyboard and Mouse Users:
Delete StarfieldPrefs.ini in Documents\My Games\Starfield folder.
Launch the game through Steam and then close out of it.
Run genesis_documents.bat again (in your Star Wars Genesis\Game folder)