great! i have this exact same issue with Fountain. it started a few days ago, but it hasn't been fixed yet nostr:npub1unmftuzmkpdjxyj4en8r63cm34uuvjn9hnxqz3nz6fls7l5jzzfqtvd0j2 here's another user with the same issue that i'm having.
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It didn't work for me either, but I also couldn't sign in with the email setup. It might be a cookie issue though.