Coinbase Wallet / TBA no longer works as an alternate wallet on mobile. Until recently, you could use Coinbase Wallet or Rainbow to transact on Farcaster using Mobile Wallet Protocol. The latest version of Coinbase Wallet (TBA) does not support this protocol. We're disabling Coinbase Wallet / TBA as an option for now after discussing with the Base team. They might add support for this in the future, and we'll revisit enabling it. Fortunately, this wasn't very widely used and only affects < 2% of transacting users.