In Bitfinex tab "Transfer / Deposit / Eter" (eye NOT eter classic), copy address, Exchange Wallet ...
In Kraken solopa "Funding / Withdraw / Ether (ETH)" add address (name: example bitfinex1 / address copied from Bitfinex (verify if copio well ...) save address, go to mail and approve ...
Once approved: in Kraken "Funding / Withdraw / Ether (ETH)" select "search loaded address" quantity: ETH wants to transfer and send, if you have configured 2F, load, go to mail (sometimes needs approval, sometimes No, it depends on the amount you send)
I hope it works ...