Inactive wallet address

Tonkeeper wallets are inactive by default. Tonkeeper can't tell if the sender of a transaction (you or someone else) is attempting to send coins to, for example, an NFT smart contract. In order to fully use your wallet address and avoid the "invalid address" error, you must activate it. To activate the wallet address, you need to make at least one outgoing transfer. Once activated, the network will recognize the address as a wallet.