Update Wordpress Divi Child Theme

I had a previous developer create a Child theme in Divi that has special code that works with AffiliateWP. We are currently seeing a "Warning: Invalid argument".

When I switch to the updated mother Divi Theme, the invalid argument goes away but other AffiliateWP functionality isn't working. Then when I reactivate the Divi Child theme, the invalid argument reappears but the AffiliateWP functionality is working.

Upon doing some research, I see there are some PHP files that are inside of the child theme but not in the primary Divi theme. I need someone to update the Divi Child theme to get rid of the "Warning: Invalid argument supplied for foreach() in"

This task need to be completed today before 11 pm ET.