Icons are included into tag

Hi,
I’m using plugin for adding a custom widgets area:
WP Custom Widget area

In PHP code it is displayed as:

<nav class="header-right">
<?php dynamic_sidebar( 'header-area' );?>
</nav>

But into html/page the social icons displays like this:

`<nav class=”header-right”>
<li id=”zoom-social-icons-widget-2″ class=”widget zoom-social-icons-widget “>
<h2 class=”widgettitle “>Social icons title</h2>
<ul class=”zoom-social-icons-list zoom-social-icons-list–without-canvas zoom-social-icons-list–round zoom-social-icons-list–no-labels”>
</li>
</nav>`

<UL> tag is missing. Please advise why the social icons are displayed into <LI> parent tag whit missing <UL>!

Regards,
– Gerrie