Look at the LED status indicators on the Smart Chime:
If the “Router LED” (or cloud icon) on the Smart Chime is solidly lit, the Smart Chime is connected to your router.
If the Smart Chime’s “Router LED” is off, the Smart Chime has disconnected from the router.
Check that your router is powered on and is working with other devices.
Confirm your Smart Chime is not plugged into an outlet connected to a switch that can be turned ON/OFF.
Move your Smart Chime closer to the router if it has been previously working with the router. Communication strength fluctuates so the distance selected was likely too far for a consistent connection.
If the Smart Chime’s “Router LED” is blinking after having been previously solid, your Smart Chime is connected to your router, but the router is not connected to the Internet. Contact your Internet Service Provider to restore Internet access after verifying with other devices.