Not rendering elements with jQuery 3.5

[TheCeloReis]

There are breaking changes that impact in this project, precisely in line 166

if you replace the self-closing element <span class="ui-icon"/> by <span class="ui-icon"></span> it will work. This is a breaking changed added in jQuery 3.5.

https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/