WCAG Compliance

Our new website has failed two of the WCAG accessibility tests and I was hoping someone could advise how to correct the issues. If they require changes to the theme itself how can that be achieved? aria-hidden-focus: ARIA hidden element must not contain focusable elements - WCAG 4.1.2, WCAG 1.3.1 1 Path #cliSettingsPopup Snippet <div class="cli-modal" id="cliSettingsPopup" tabindex="-1" role="dialog" aria-labelledby="cliS ettingsPopup" aria-hidden="true"> Autocomplete: Text fields that serve certain purposes must have the correct HTML5 autocomplete attribute - WCAG 1.3.5 1 New for WCAG 2.1 Path .search-field Snippet <input type="search" class="search-field" placeholder="Search" value="" name="s" title="Sear ch for:"> Input type search Autocomplete (no value)