Like an issue I described in a previous post this issue only appears when you resume your PC/laptop from a hibernated state
If you’re affected by this problem the Samsung Flow Windows 10 app will attempt to connect to your mobile phone after you click on the “Smart View” option but will then display 4 spinning coloured dots and finally fail to connect to your phone
If you restart your laptop then launch Samsung Flow and try the “Smart View” option in the app you should then be able to reconnect to your mobile phone