In this case, maybe you already disabled ‘Ajax cart’ option in block cart module.With our theme, you can go to the admin: Modules >> SP Block cart >> enable ‘Ajax cart’ option

You can check code more in the file: override\controllers\front\CartController.php

These is the code in end of file:

elseif (file_exists(_PS_MODULE_DIR_.’/spblockcart/blockcart-ajax.php’))
require_once(_PS_MODULE_DIR_.’/spblockcart/blockcart-ajax.php’);

=> Please make sure the path correctly

(You can check ajax file in the path is: modules/spblockcart

Example the file is: modules/spblockcart/spblockcart-ajax.php)

Please change the above code to:

elseif (file_exists(_PS_MODULE_DIR_.’/spblockcart/spblockcart-ajax.php’))
require_once(_PS_MODULE_DIR_.’/spblockcart/spblockcart-ajax.php’);

 

Thanks