Does the function return a 502 error?

Question

JavaScript

The operation of multiple adding items to the cart. If you add less than 9 products, then the adding function will return the required json, if 9 or more, the function returns a 502 error, and the products will be in the basket.

Answer 1

For those who are interested, here is the solution to this problem stackoverflow.com/questions/13894386/upstream-too-... . Changed ngnix settings and everything works.

Answer 2

error log will help you.