Mobile (Burger) Menu shows on Desktop, not on Mobile

Mobile menu show in addition to main menu but does not show on mobile. This is a 4.1.2 Enfold build. I have another site, prsa-pgh.org that is using Enfold 3.8 and the mobile menu does appear correctly.

In researching the forum, I found a solution with this code:

@media only screen and (max-width: 1366px) and (min-width: 768px) {
.responsive #top .av_mobile_menu_tablet .av-main-nav .menu-item {
display: none;
}

.responsive #top .av_mobile_menu_tablet .av-main-nav .menu-item-avia-special {
display: block;
}
}

However, it does NOT work.

This is the second time I have posted this issue. This client cannot announce their new website without this fixed. FTP and WP logins were previously given.