During the setup of your FridgeCam, one of the stages is to set the capture angle of your fridge.
If you can not see this live stream it could be due to poor internet connection.
To test this, bring the FridgeCam within a meter of the router. If the live stream then appears, the problem is due to poor internet connection.
In order to boost your internet connection, you can purchase a WIFI booster to boost your internet connection around the house.