Hello, Cristina,
Thank you for the reply.
We’ve disabled “AJAX Agregar Al Carrito Para Productos Simples Y Variables” via Theme Options > WooComerce > Single product page > Diseño de un solo producto.
The product can be added to the cart now – https://prnt.sc/iDPCXXN72Ofg
There is a js error from YITH WooCommerce Product Add-ons & Extra Options Premium plugin, please check the screenshot in the Private Content area. We would recommend you contact the support team of this plugin.
Kind Regards,
8theme team