Blank Screen trying to buy Minecraft

I'm trying to buy Minecraft Java Edition which goes fine until I'm asked to make an xbox gamertag (I'm on PC, Win 10). I make a gamertag click okay and it loads the next page which is just a blank page with the url 'about:blank'. Maybe I'm just being dumb and this is really simple but I can't figure it out. Also not sure where I'd report this so I'm just trying here. I've tried looking for this issue online but they're all once you buy Minecraft and get the launcher. I'm still on the webpage...