i ran into this trouble this evening when i added a new card and tried to confirm it. i got the pp code but can't find anywhere on the web app to enter it. it took me a while but eventually i stumbled upon a solution albeit it was very convoluted. in the updated pretty paypal web app, click on wallet, then scroll down all the way to the bottom, click on classic site, this takes you to a dated or classic site version of the paypal app. find your credit card in the my money section, click on update and voila, there should be a box letting you enter your pay pal code from you credit statement. hope this helps everyone.
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