First, double-check that your .FIT files are set to save locally. If you haven't done so already, click on the User icon in the top right corner of most screens, then choose Profile. Click on Data Handling (4th tab along top), followed by the Connect button to be redirected to Strava where, after sign in, it will walk you through the connection process. Your Fit File will then be saved and uploaded to Strava each time you ride. Confirm the "Save Fit files locally" box is checked to save it locally.
After you complete a physical activity, you can find your fit file here: The drive the game is installed on/Program Files/Smash Your Fitness/Rides.
For more help, contact Support@SmashYourFitness.com