I would guess: a little patience is all you need

Btw is there a fee to withdraw parked tfl? Or is this only for btc?
Yes, there is. I've managed to withdraw TFL tokens to my wallet and there was a fee of 3 TFL charged.
Still I cannot withdraw my btc earnings, it keeps giving an error that I've got insufficient funds on my account. I've already tried to lower the sum significantly but it didn't help. So I can't withdraw anything from what I've earned in the lattest masterflip game. Very strange...