If the router enabled a whitelist mode, or MAC address filter, please add Vobot's MAC address to the whitelist.
You will find the MAC address of Vobot in router's configuration page, it's named like "access control", "client list" or "MAC Filtering". See also: How-do-I-configure-Access-Control-or-MAC-Filtering. You may disable the filtering feature on router and try setup again.
If you are still unable to find it, please contact us with your device's S/N.