Can't log in on iPhone 7

I just signed up for a free trial and am logged in on my PC browser.

Downloaded the app to my iPhone 7 Plus (iOS 13.3.1) but it won’t accept my credentials. Have checked to ensure no typos.

Have also checked https://status.zwift.com/ and it says “all systems operational.” I can see there was some maintenance done at 04:30 UTC but that would’ve been hours ago.