Go to the SGKCharacterInputs and copy the video below. Yours may already match what I do in the video below but you should check them anyway.

Next go to the BP_ControlsSettings widget and copy the video below.

Next go to the BP_InGameMenu and copy the video, if yours doesn’t have the little reset arrow next to the Default Keys setting like in the video below check the Default Keys values for the Forward, Backward, Left and Right to make sure they are set correctly.

You should now be able to go to the Controls menu in game and click the Defaults button to reset all the keys to their default key binds.