help needed with netplay ps vits

Hello not sure if this is the right place for this but cant seem to open a new topic, i have two psvitas both with the same version of retroarch (1.9.0 latest) and it wont let me host netplay on either when i try it just says failed to initialize? But if i host a game from my phone and join it with either psvita it works how can i fix this issue thanks