Hello everyone, I hope you can help whit this.
I have the following sentence in English:

The drama in 'The Class' comes not from the way Marin reaches the kids, but how he fails them.

I believe there is a grammatical error in this construction, namely that there is a propositional phrase lacking, but I am not quite sure. I believe the sentence shoul read as follows:

The drama in 'The Class' comes not from the way Marin reaches the kids, but from the way he fails them.

Can you tell me if English allow for the original construction or if it is a grammatical error?

Thank you all