Accessibility Issue on Admin Page

The issue can be found here: currently just on a localhost on /wp-admin/admin.php?page=metaslider
The preview works: Yes
It works with other themes: Haven’t Tried
It works when I disable all other plugins: Haven’t Tried
Meta Slider version: 3.5.1

Good morning!

I’m a new user testing out your plugin for our Network. Everything seems to be in working order, but I ran into an accessibility issue on the admin page.

When working on a slide, I cannot navigate through the General, SEO, and Crop tabs using my tab key; I have to use my mouse to get through them. Digging around a little, I can force it to let me tab through if I change this HTML:

<ul class="tabs">
<li class="selected" rel="tab-0">General</li>
<li rel="tab-1">SEO</li>
<li rel="tab-2">Crop</li>
</ul>

To this:

<ul class="tabs">
<li class="selected" rel="tab-0"><a href="#tab-0">General</a></li>
<li rel="tab-1"><a href="#tab-1">SEO</a></li>
<li rel="tab-2"><a href="#tab-2">Crop</a></li>
</ul>

I can’t tell if that messes with anything on the backend, but as a hack it got the job done.

Would there be a way for this to be fixed in the plugin? This is otherwise an excellent plugin that I would hate to give up on because of this single issue.

Thank you for your time!