Rooma, Metropolitan City of Rome Capital, Italy

Please let me know if you solve the problem 😔 💙

Go to settings (Warpcast settings) > Advanced> Reveal Seed(recovery)phrase> copy this seed phrase then go to Coinbase Wallet Or any other wallet and Import this seed phrase there (make wallet with seed(recovery) phrase from your warpcast account) then connect this wallet to build website and claim token.

You have to claim/commit through warpcast custody wallet. 
I had something similar so I had to import my Warpcast seed phrase into wallet to claim. I wasn't able to claim through my connected wallet but it worked with Warpcast seed phrase. 
Import your warpcast seed phrase into wallet and claim, it will work.