Help me with this – PS Remote Play Review

I downloaded this 2 days ago and when I try to connect it it says my ps4 wasn’t found even though I’m right next to it, so then I try to link it manually and it gives me a code to put in but when I put it in it says there was an error it says that on my phone and ps4 so someone pls help me fix this
Review by Spider_Bryn on PS Remote Play.