The module doesn't let me add more than 100 products to an attachment. How to fix it?
The extension itself doesn’t have any limits on the number of products to be assigned to the attachment. However, the maximum number of products that can be assigned to an attachment on its edit page is controlled by a PHP variable and the server setting max_input_vars.
To add more than 100 products to a single attachment, kindly update the PHP config file and set a greater value for the max_input_vars variable (e.g. to 5000). Please keep in mind that you need to restart PHP or server in order for changes in php.ini to take effect.