Hello,
The Issue is with using the Old HTML Codes from the Previous Versions of Canvas. Please make sure that your Codes look like this:
<ul class="menu-container">
	<li class="menu-item current">
		<a class="menu-link" href="index.html"><div><i class="icon-home2"></i>Home</div></a>
	</li>
	<li class="menu-item">
		<a class="menu-link" href="self-drive-maps.html"><div><i class="icon-map"></i>Park & Reserve Maps</div></a>
	</li>
	<li class="menu-item">
		<a class="menu-link" href="self-drive-ebook.html"><div><i class="icon-book3"></i>Guide Your Own Safari eBook</div></a>
	</li>
</ul>
This should definitely work fine. Please consider checking the Migration Guides for the Menus: http://docs.semicolonweb.com/docs/upgrading-v5-to-v6/migration/ . Hope this Helps!
Let us know if we can help you with anything else or if you find any further issues.