PrusaSlicer : Print host upload queue

Hi while waiting for printer and PI I'm running Octoprint on an old PC. Saw "Print host upload queue" in Windows/ tootbar. Tried configuring for Octoprint in Printer setting tab/General.

I can ping the IP old PC's address but nothing appears in Browse pop up. Tried various combos of IP and URL no luck. Seems like I'm missing a network protocol thats on the PI by default.

Any suggestions other than "wait till you Pi arrives".

Did you enter the correct API key into PrucaSlicer?

I generated a new key in Octoprint settings/API. CORS is not ticked.