Sensitive: you need to adjust the Divi theme to work as designed with Divi Builder

I am trying to update my main site and chose to use another domain as a test project. It looks great in the preview, but once published, the background images are not displayed and there are other problems. I need someone to intervene and help me make this work on computers, tablets and phones (yes, I tested the visibility codes). I need help as soon as possible. Willing to pay a reasonable fee. Thank you.