Taking two cards happens twice in the tutorial, always with the Killdeer ability.
First time
1) click on the Killdeer to select an egg to discard
2) click on the Western Meadowlark in the tray to get the first card
3) click on the deck to get the second card (or click on the Draw from deck button above)
Second time
1) click on the Horned Lark to select an egg to discard
2) click on the Turkey Vulture in the tray to get the first card
3) click on the deck to get the second card (or click on the Draw from deck button above)
On the second time, if you select an egg of the Killdeer to discard (which would be totally fine in the game, but in the tutorial you need to follow exacly what was played), then you have the error message that you described ("You must play the move indicated in the tutorial.") when you try to click on the Turkey Vulture.
If this is where you are stuck, just press the cancel button on top and then select the Horned Lark instead to discard the egg.
If this is not where you are stuck I think we need more info to help you.
