Troubleshooting
Tap Send me the link in the banner, open the email and follow the link, then come back and tap I've confirmed it. Planning works without it, but publishing a wedding page and posting in the community both need a confirmed address.
The banner at the top of your dashboard has the button. Tap Send me the link, and an email goes to the address you signed up with.
You can keep planning without confirming. It only gates the two things that put words in front of other people: your wedding page and the community.