If your Withings Aura is close to an LED, CFL (Compact Fluorescent) or another type of energy-saving bulb, you may experience disturbances with it (such as the light flashing). Make sure that lamps using such bulbs are placed at least 1 m / 3 ft away from your Withings Aura to avoid any interference.
If you still encounter issues, reach out to Customer Service by clicking the Contact us button at the bottom of the page.