Paywall call to action goes red when email address is incorrectly formatted

[benborgers]

https://github.com/user-attachments/assets/7e6f6de9-8df2-4891-aebd-a723ebb6bd72

https://secure.helpscout.net/conversation/2663343715/5043/

[mary-ext]

Haven't been able to repro this on dev, deferring for a bit