What cinema classification is the new Harry Potter?

You're likely referring to "Harry Potter and the Cursed Child," which is a play, not a movie. Therefore, it doesn't have a cinema classification like PG-13 or R.

However, the play does have an age recommendation. It is recommended for ages 11 and up. This is because the play contains mature themes, including death, loss, and difficult choices.

If you're asking about a specific movie in the Harry Potter franchise, please specify which one.