templates_bootstrap/bootstrap4/publisher/publisher_header.tpl
<{if $publisher_display_breadcrumb}>
<!-- Do not display breadcrumb if you are on indexpage or you do not want to display the module name -->
<{if $module_home or $categoryPath}>
<ol class="breadcrumb">
<{if $module_home|default:false}>
<li class="breadcrumb-item<{if !$categoryPath|default:false}> active<{/if}>"><{$module_home}></li>
<{/if}>
<{if $categoryPath|default:false}>
<{if !$categoryPath|strstr:'<li>'}>
<{assign var=categoryPath value="<li>$categoryPath</li>"}>
<{/if}>
<{$categoryPath|replace:'<li>':'<li class="breadcrumb-item">'}>
<{/if}>
</ol>
<{/if}>
<{/if}>
<{if $title_and_welcome|default:false && $lang_mainintro|default:'' != ''}>
<div class="well">
<{$lang_mainintro}>
</div>
<{/if}>