Error[Solved]

Question

So I get an error when trying to add an object to my vector. Why?
I've tried a few things but I came up with nothing

Edit: Nevermind, I fixed it.

https://code.sololearn.com/c842MPT0CN64/?ref=app

Answer 1

Manual I was storing Product in Cart rather than Product*

Answer 2

What was wrong with the code?