Every single time I try and host my game, it says...

"Error 4: Port 42480 closed, attempting to find UPNP devices" And then says...

"Binding Failed" Then closes the host application. Help anyone?

So type in a tutorial on Youtube, there's one made by Ratatooie its called "Port forwarding brick hill games! (VERIZON ROUTER)" , if you are using a Verizon router or anything else. Maybe except TP-Link. I hope this will help.
Link to video: https://www.youtube.com/watch?v=jx-PE2By9s4&t=296s