Hello,

Our support does not cover fixing custom code. Our developers are just overloaded working on the theme and have no possibility for additional services.

In order to solve the issue, please follow these steps.

Copy and save separately all the content of functions.php of the child theme, and enable it. Then check the site, and make sure everything works properly.

Then add snippet by snippet checking the site and you will detect which snippet causes the problem. Delete it. In addition, this testing would allow you to detect if which customization snippet is necessary and which is not.

If you have any questions please feel free to contact us.

Best Regards