Sorry, no products matched your selection. Please choose a different combination

Hi,

I am currently updating my website, which is currently behind maintenance mode and am getting an error with the products in the woo frequently bought together. When testing any time I try to add a frequently bought together product I get the error message:

“Sorry, no products matched your selection. Please choose a different combination”

This occurs when trying to add any variation of the addon product.

I read that it could be due to the AJAX variation threshold but I have added code to increase that to 1000. I have also disabled maintenance mode and tested in a private window mode but the same problem occurred.

Any ideas as to what could cause this? My site is still in maintenance mode so if you would need to view this to try and fix the error please let me know and I will disable the maintenance mode.

Thanks

The page I need help with: [log in to see the link]