Horizontal scroll bar on mobile devices

How to debug and troubleshoot a horizontal scroll bar on mobile devices

This is due to an element creating overflow. You can quickly find which item is causing the problem by following the instructions here:

Easily debug horizontal scrolling on mobile devices

Once you have determined which section has overflowed, you can edit the Design tab and switch Overflow a Hidden or preferably try to detect the value that is creating the overflow.

If you prefer, you can opt for a less technical way to find the section that has overflowed. Just save the page as a template, then edit the template. Delete each section one by one and test on mobile after each deletion. When the problem disappears, you have found the problem section.