- Make sure that Location is ON (globally and for Sensie)
- If it still doesn't work, backup your database to OneDrive and reinstall the app.
- If it still doesn't work, install any other app that uses SensorCore, e.g.Daily Activities Universal and check whether it works in the other app
- If it doesn't work in any SensorCore app, you'd need to reinstall/reset your OS
(http://windows.microsoft.com/en-US/windows-10/windows-device-recovery-tool-faq)