Thanks for letting me know, I just disabled the check that prevented two login or confirmation emails sending in the same day (since I added in captchas). It's possible one of your emails bounced, so you can try re-logging in on the website to re-send the account confirmation email. The app token needs to come from the 'Regenerate Token' button on the preferences page, or else they expire.

Also, if you signed up with a gmail account then you need to add in the +aworkoutaday into your email for legacy reasons.