Problems with Paypal payment?

Hi folks, 

I can't seem to get the Paypal method of payment to connect correctly.  Is that no longer supported?  Has anyone gotten that to work when the list an item for sale in the last day or so?

I haven't sold on here is a while, so the interface is new to me, but when I get to the part where I have to select payment methods, I can select Paypal, but then a popup window opens and nothing happens...

Any advice?