Error 403 when loading products in BOPO

Hello we have noticed a really slow performance inside the BOPO options, when trying to load the products, in desktop seems okay but in mobile takes too long to load.
Is there any script or hook to give priority to that process or preload those products? To improve the speed in that area?
https://decen.com.mx/cunas/paquete-decen/

We saw 403 error

I have added a login url for 1 week.

Thanks!