How to solve”No Rules defined for “

Replies: 0

Hi There,

I have different warnings :
No rules defined for <div class=”vc_row wpb_row st bg-holder”>
No rules defined for <hr>
No rules defined for <div class=”vc_row wpb_row st bg-holder vc_custom_1483674140765″>

Can I actually ignore the above warnings or I MUST set my own transformer rules? Or are there any better way to avoid these above problem from happening?