You just need to update the two wrapper files in the wrapper forlder.

Update the start wrapper with:

echo avia_title();
echo '<div class="container_wrap main_color sidebar_right">';
echo '<div class="container">';
echo '<main class="template-page content  av-content-small alpha units"  role="main" itemprop="mainContentOfPage" >';

And the end wrapper with:

echo '</main>';
get_sidebar();
echo '</div></div>';