I've had the same problem and haven't used Fountain for the longest time because of this
A month after being rugged by nostr:nprofile1qqsx2wyjt6lmvc05rrvv05r5hm3w3t7h0pcpmkyswrpd4ymd2u09tscr0kfvc still can’t create wallet

Discussion
Yeah me too. Gor an email from suport saying that they are rebuilding login/verification process and should have new release in next weeks ready