Thrumming Stone does not let me cast spells

[Lunafreliana]

I did cast [[thrumming stone]] and after that i casted [[dragon's approach]]. The thrumming stone trigger did show me 4 cards and highlighted one dragon's apporach green. But i was not able to cast that highlighted card at all.

[github-actions]

Thrumming Stone - (Gatherer) (Scryfall) (EDHREC)

{5}
Legendary Artifact
Spells you cast have ripple 4. (Whenever you cast a spell, you may reveal the top four cards of your library. You may cast spells with the same name as that spell from among the revealed cards without paying their mana costs. Put the rest on the bottom of your library.)

Dragon's Approach - (Gatherer) (Scryfall) (EDHREC)

{2}{R}
Sorcery
Dragon's Approach deals 3 damage to each opponent. You may exile Dragon's Approach and four cards named Dragon's Approach from your graveyard. If you do, search your library for a Dragon creature card, put it onto the battlefield, then shuffle.
A deck can have any number of cards named Dragon's Approach.