Black screen and error when trying to link to PrusaConnect
So I recently got a Mk3S+ from a friend, and I wanted to hook it up to WiFi. Soldering the Pi Zero 2W was a bit of a challenge as I'm kind of a novice at it, but managed to get it to work after some fiddling. Now the setup for PrusaLink works fine, although I haven't tried printing with it yet. The problem is that in step 20 of the PrusaLink and Prusa Connect setup (MK3/S/+) | PrusaLink Wizard - Recap page, clicking the button "Save printer and link with Connect | NEXT" is supposed to bring me to the Prusa Connect page where I can add my printer. Instead I get a black screen where nothing happens.
Refreshing this page gives me the error "410 Gone", and navigating back to the PrusaLink page shows that PrusaConnect is not linked.
Hovering over the information symbol gives no further information, and trying to Link to PrusaConnect from the settings page throws a generic "400 Can't Connect" error as well.
I've tried restarting my computer, the wi-fi, changing the SD card and flashing the 0.7.2 firmware version just in case that was the issue, but the same thing happened. After 3 hours I'm just about out of ideas, would appreciate if some kind soul could help me out here! Really hoping it's just a minor setting I've overlooked somewhere.