Parse error:syntax error [closed]

use single quotes outside of the following statement, why you are getting this error because you are using double quotes for class attribute "</span><span class="meta-sep">|</span>" and also wrapping it in double quotes.

replace this

"</span><span class="meta-sep">|</span>"

with

'</span><span class="meta-sep">|</span>'

or vice versa

"</span><span class="meta-sep">|</span>"

<?php the_tags( '<span class="tag-links"><span class="entry-utility-prep entry-utility-prep-tag-links">' . __('Tagged ', 'your-theme' ) . '</span>', ', ', '</span><span class="meta-sep">|</span>' ) ?>