Unable to start Share Play because the speed of your network (Upload) is lower than 2Mbps. We recommend you to improve your network speed.

To get the best experience from Share Play, both you and your friend will need a high-speed internet connection of at least 2Mbps.
  1. Please note that it is recommended to use a LAN cable to connect your PlayStation 4 to the network.
    If you are using a Wi-Fi connection, try to place the PlayStation 4 system and the router closer together, and make sure there are no obstructions between them.
  2. Check if other devices on your network are using a large amount of bandwidth. Wait until they are finished.
  3. Go to Party > Party Settings > Video Quality for Share Play and make sure to set both Resolution and Frame Rate as "Standard".  You will need a high-speed internet connection to use Share Play in "High". 

To check the connection status of the PlayStation 4 system, go to Settings > Network > Test Internet Connection.