Prestashop 1.7.6 error: "Unfortunately shipping" when i put shipping price. Free shipping works ok

[hombredeincognito]

Hello, I am trying to change the free shipping costs and configure shipping costs by price (attached screenshots).

> Prestashop 1.7.6 

Data I have reviewed:

Products do not have types or models. Only products with price.

The products are active for all types of carriers.

In Payment > Preferences, the carrier and the country are active and correct

I have tried clearing the cache and entering an incognito window creating a new shopping cart.

The problem is that when my carrier is free and I set it to have a cost according to the value of the cart, the carrier disappears from the cart.

Any idea what is happening?

I'm sorry for my English.

Thank you!

Edited November 5, 2022 by hombredeincognito (see edit history)

[hombredeincognito]

Hi!

I solved it, it was a class overriting the "Cart.php" class in "override/classes", and this change the funtion getPackageShippingCost and cause the error.