Problem with Pottermore?

[David]

You're in Hufflepuff? Maybe I shouldn't help you...

I have that problem all the time. I don't know what causes it, but you just have to wait patiently on the same "brew a potion" page. The key is that the sign that says something like "Your potion is now brewing, check back later" (or, after Part 2, "You've successfully completed your potion") at least has to begin to appear. Even if you just see the text, and not the background, you'll be fine. If the sign doesn't come up, Pottermore won't register that you've completed the steps. It's stupid, and like I said I don't know why it can take awhile. It may take a bit of time, but it will appear. Just make sure that you don't close out of the window.

Oh, and there are other ways to gain points other than potions. You can duel (but that's incredibly glitchy so I don't do it much), and you can also get a point for everything you collect in the moments.

Good luck!