Error code

PlayStation NP-37667-9

PLAYSTATIONNP-37667-9
Game/Platform Error· An error code shown by a game or gaming platform/launcher.

What it means

The Share Play connection was lost because the network connection became unstable..

How to fix it

  1. Use a wired LAN connection instead of Wi-Fi.
  2. Move the PS4 and router closer together.
  3. Wait for other high-bandwidth devices to finish using the network.
  4. Test Internet Connection via Settings > Network.

Not affiliated with PlayStation. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.