Parse error: syntax error, unexpected identifier "link", expecting "," or ";" inecho '<a href="the_field('link-bc');">
<span class="breadcrumbs__current">';
the_field('bc');
echo '</span>
</a>';
echo '<a href="' . the_field('link-bc') . '">
<span class="breadcrumbs__current">';
the_field('bc');
echo '</span>
</a>';the_field уже есть echo и тогда должно быть так:echo '<a href="';
the_field('link-bc');
echo '"><span class="breadcrumbs__current">';
the_field('bc');
echo '</span></a>';