I have been having this problem for several weeks. I've tried all the steps too. Clearing cache, restarting the browser, rebooting. Different browsers. Different computers with different versions of Windows. I got it to work once with Edge, but now my Edge has updated to the Chrome based one and it's broke too. My primary browser, Opera, just has the spinning icon on when it's trying to load that stupid page trying to get you to stay logged in. I now have it drop all the cookies for PayPal every time I exit. That gets me to the login page on eBay checkout, but then stops as soon as it tries the next one. Now I'm also having problems logging directly into PayPal.com because it's throwing up that 'stay logged in' page there. I don't want to stay logged in, but can't ever get rid of it. I stayed with PayPal all through the eBay Managed Payments fiasco, but this is too much. PayPal should at least own up to the problem. Note that I just managed to pay using IE 11. Nice, PayPal forcing us to use outdated, unsafe browsers. Old browser or new payment processor, you do the math.
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