Doesn't log in with Facebook? – Perk Wallet Review

I signed up with Perk through Facebook and when I login, it redirects me to Safari to say that Perk has already been approved, then asks if I want to open a page in Perk wallet. Whether I say yes or no, the app does not log me in. I want the Perk Plastik Card and this is holding me back from it.
Review by musiclovah777 on Perk Wallet.