QUESTION menu error

[alframcal]

Good morning, hello thanks for replying I use WAMP server http: //localhost/get/index.php

I have a problem with this code:
<?php get_navigation ($currentpage =get_page_slug (false), $classPrefix = "nav-item active"); ?>
returns this to me:
<li class="nav-item activeindex"><a href="http://localhost/get/" title="HOME">Home</a></li>
<li class="nav-item activecontacto"><a href="http://localhost/get/contacto/" title="CONTACTO">CONTACTO</a></li>

but I want it to return like this:
<li class="nav-item"><a href="http://localhost/get/" title="HOME">Home</a></li>
<li class="nav-item"><a href="http://localhost/get/contacto/" title="CONTACTO">CONTACTO</a></li>

I use this in my code
<nav>
<div>
<?php get_navigation(return_page_slug()); ?>
</div>
</nav>


Thanks in advance!