If you are not logged in to the YoLink App and do not have a YoLink App account, the authorization cannot be completed.
Please download YoLink App first, and add YoLink devices to YoLink App. Then connect YoLink with Google, please visit the following video How to integrate with Google Home
If you do have YoLink App account, there might be three reasons:
1, There is a new version of Google Home, please update your Google Home.
2, Please do not use two phones to log in to your Google account. If you open your account on two phones at the same time, there may be many unknown situations, such as a crash.
3, Please make sure your network signal is strong. If the signal is too weak, it will take more time to load, please wait.
The reason may be that your devices do not support Google.
Currently, Google Assistant supports YoLink Plug, YoLink Plug Mini, YoLink In-Wall Outlet, YoLink In-Wall Switch, YoLink Power Strip, YoLink Outdoor Plug, YoLink Gas/Water Valve, YoLink Door Lock, YoLink Sprinkler Controller, YoLink Thermostat, YoLink Door Sensor, YoLink Garage Door Kit, YoLink Garage Door Kit 2, and YoLink Siren Alarm.