I'm pretty sure all I did was join the Telegram channel and it automatically generated a wallet for me. Then in Fountain hit the wallet tab, withdraw, copy invoice and past into Telegram to withdraw. After that I just generate an invoice via Alby for the amount I want to send from ln.tips (-1%) and paste that invoice into Telegram to pay it. Super annoying but works. I'm not sure what causes the issue when trying to withdraw to my Alby wallet directly.