Cleric of Scales Bugged

Card didnt work and i had a dragon on the field and 2 in my hand. I have the screenshot to prove it.

Having dragons on the field has nothing to do with Cleric of the Scales. However, since the Cleric discovers a card from your deck, did you have any spell card left in your deck?

If you feel like the screenshots will help us see what you had in your deck, you can share them as follows:

did you have a spell in your deck?
also please explain in more detail what happend, rather than “card didnt work”. what did happend? what did you expect to happend? etc

Cleric of Scales discovers a spell from your deck.

Did you have any spells remaining in your deck?