The following css adds an outline to all elements, causing you to see where the element is that causes the overflow.

• Use the outline or the background
• Outline adds an outline to all elements (Divi needs !important)
• Background hsl(0 = red 100%=saturation 50% = lightness / .1 = opacity), this shows you the layering of elements.

/** START finding overflows **/
*,
*::before,
*::after{
box-sizing: border-box !important;
outline: 2px solid lime !important;
background: hsl(0 100% 50% / .1) !important;
}
/** END finding overflows **/Code language: CSS (css)

See how:

To fix overflows and horizontal scrollbars

• Set the overflow to none on the Divi advanced tab of the element that causes it.
• Or add the following CSS

#page-container {
overflow-x:hidden;
}Code language: CSS (css)