Nav buttons and social icons black/uneditable

The navigation button and social icons on a site I am creating appear as black on black. I have looked into all of the style/color settings and am stumped! Any ideas? (Social icons are hidden currently but you can see the issue with the button)

Hi,

What is your site url?

https://bmvappraisals.squarespace.com/home-new

You try edit First Section > Colors > Then adjust Primary Button Color

Or add this to Website Tools (under Not Linked) > Custom CSS to change button color to white

a.btn {
    color: white !important;
}