So, I'm working on a site. I didn't develop and I don't have access to the developers. The site uses a custom designed Bootstrap based theme, built with Page Builder. I just moved the site to a development server, and added myself a user and updated. The issue I'm having seems to be that one of the functions that write the page's HTML is messing up somewhere, and printing PHP into the CSS classes. The page's theme renders correctly on the production server, but don't write the correct class and style attributes on the dev server.
The output HTML with the PHP is
<div class="spacer spacer-60"></div></div></div></div></section><section data-anchor-title="Profile" data-anchor="profile" id="profile" class="<?print implode(' ',$classes); ?>" style="<?print implode(';',$styles); ?>">
I've poked around in the theme files, and there isn't an obvious place where the app is choking on this.