Thank you for your response. I’ve managed to identify the problem. There is an option that, when activated, slows down the site and causes issues with Ajax.
I will send you the screenshot.
If I can continue on this thread, that would be great; otherwise, I can start a new one if you prefer. We are also experiencing slow additions to the cart. Is there any code I could modify in the files to reduce this add-to-cart time?
We have conducted server tests and plugin compatibility checks, but it was found that the way the cart addition code is written is demanding more requests and server load, unlike other themes.