What is incorrect about the following sentence. I would of liked to have seen that?

The incorrect part of the sentence is "would of". It should be "would have".

Here's why:

* "Of" is a preposition, meaning it shows the relationship between a noun or pronoun and another word in the sentence.

* "Have" is an auxiliary verb that helps form the perfect tenses (present perfect, past perfect, future perfect).

The correct sentence is: I would have liked to have seen that.