Yoast breadcrumbs disappeared / not showing

Hello.

I changed the code in my child theme like so:

https://kriesi.at/support/topic/add-yoast-breadcrumbs-in-the-same-spot-of-the-enfold-breadcrumbs/#post-243686

Under Theme Options – Header Layout – Heater Title and Breadcrumbs I set it to “Display only breadcrumbs”.

Breadcrumbs showed for a brief period, but they no longer show. However, if I set the above to “Display title and breadcrumbs” both show up in the header.

Can you please advise what changes I can make to resume showing breadcrumbs in the header? Also, I would like breadcrumbs only to show on full screen width, so I have inserted the following code under General Styling – Quick CSS:

@media only screen and (max-width: 767px) {
        .breadcrumb {
                 display: none !important;
        }
}

Thanks!