vCard error

This is correct:

// author box name
$saboxmeta .= ‘<div class=”saboxplugin-authorname”>’;
$saboxmeta .= ‘<div class=”vcard author”><span class=”fn”>’;
$saboxmeta .= ‘‘ . get_the_author_meta( ‘display_name’, $author_id ) . ‘‘;
$saboxmeta .= ‘</span></div>’;
$saboxmeta .= ‘</div>’;

// author box description
$saboxmeta .= ‘<div class=”saboxplugin-desc”>’;
$saboxmeta .= get_the_author_meta( ‘description’, $author_id );
$saboxmeta .= ‘</div>’;

https://ww.wp.xz.cn/plugins/simple-author-box/