Klipper Fluid on rp3 refuses to connect to my Ender3 v2

i followed this YT guide.
i got everything up to here by copying the required lines into the printer.cfg
my final printer.cfg looks like this

saved the printer.cfg and restarted Klipper and Firmware Restart but Klippy still cant connect to the printer as seen in the error.

where did i go wrong?

Please follow the questions that were asked for when you opened the request