I am new to using child themes, I just found it easier to be able to see the whole stylesheet when making my changes (rather than jumping back and forth between the empty child sheet and the original).
I just disabled the child theme, and now the menu works with the vanilla Voltata. I will add only what I want to change in the stylesheet, so that it is easier for you to see issues.
*Edit: I added elements back in to figure out what the culprit is. Turns out, it’s my modifications to page.php. When I remove the following code:
<?php get_sidebar(); ?>
<?php get_footer(); ?>
The menu no longer works. I just don’t want the dark bar across the bottom…perhaps a workaround is to change the color of the footer to match the white background?