HTML5 validation outline error: heading level skipped on the tourCode/stepSheet

 Error Details

Validation errors in xwiki:TourCode.StepSheet()
ERROR: The heading “h3” (with computed level 3) follows the heading “h1” (with computed level 1), skipping 1 heading level. at line [1209] column [18]

Extracts of the invalid content:

  1207         <div class="row">
  1208     <div id="xwikicontent" class="col-xs-12">
  1209               <h3>New step</h3>
  1210 <div class="xform" id="stepForm">
  1211 <dl>