I am not able to add my device to the Cloud. What should I do?

Reboot the router and try adding the device again. If device is still not included successfully, check the IP address of Shelly device and type it in the web browser. Then when WebUI is loaded, check in the right corner if Time tab is working. If not, that means that your device does not have internet connection and problem could be in the default gateway, firewall, DNS etc.