I believe the correct sentence is "I would have liked to see that."

You answered your own own question. I would've liked to have seen that.

You say you are learning Spanish, it must be English that you are learning, I guess?! "OF" is a preposition En espanol el preposición 'DE' It doesn't belong between the auxiliary verb *would* ( modal auxiliar verbo ) and the second verb (like).

Well, if this is the standard of ESL teachers......

James is right