Template does not save

Sure, here it is:

<div class="topnews-container more-news col-xs-12 col-sm-6 col-md-3 <?php if ( has_post_thumbnail()) { ?>yes-img"<?php } else { ?>no-img"<?php } ?>>

      <?php // Top Story Card ?>
    <div class="topstories-card">
      <?php // Top News Image & Headline ?>
      <div class="topnews-img">
        <div class="topnews-cat <?php if ( has_post_thumbnail()) { ?>whitecat"<?php } else { ?>blackcat"<?php } ?>>
          <?php $categories = get_the_category();	if ( ! empty( $categories ) ) {	echo '<a href="' . esc_url( get_category_link( $categories[0]->term_id ) ) . '">' . esc_html( $categories[0]->name ) . '</a>'; }; ?>
        </div>
        <?php if ( has_post_thumbnail()) { ?>
        <div class="tn-img"><a href="<?php the_permalink(); ?>" class="entry-img">
        <?php the_post_thumbnail( 'LatestNews-XSmall' ); ?>
        </a></div>
        <?php } ?>
      </div>

      <?php if ( !has_post_thumbnail()) { ?><div class="topnews-textbox"><div class="topnews-text"><?php } ?>
      <h1><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php if (strlen($post->post_title) > 40) {
echo substr(the_title($before = '', $after = '', FALSE), 0, 40) . '...'; } else {
the_title();
} ?></a></h1>
      <div class="topnews-author"><?php the_author(); ?></div><div class="topnews-date"><?php echo get_the_date(); ?></div>
      <div class="topnews-excerpt col-md-8">
        <?php if ( has_post_thumbnail()) { ?>
        <p class="short-excerpt"><?php echo get_excerpt(95); ?></p>
        <?php } else { ?>
        <p class="long-excerpt"><?php echo get_excerpt(180); ?></p>
        <?php } ?>
      </div>
      <?php if ( !has_post_thumbnail()) { ?></div></div><?php } ?>
      <?php // END Top News Image & Headline ?>

      <?php // Social Icons ?>
      <div class="topnews-social <?php if ( has_post_thumbnail()) { ?>"<?php } else { ?>no-img"<?php } ?>>
        <div class="topnews-social-group">

          <div class="topnews-social-icons">

          <div class="addthis_toolbox addthis_default_style topnews-share" data-url="<?php the_permalink(); ?>"
    data-title"<?php the_title(); ?>" > <a class="addthis_button_facebook" addthis:url="<?php the_permalink(); ?>" addthis:title="<?php the_title(); ?>" ></a> <a class="addthis_button_twitter" addthis:url="<?php the_permalink(); ?>" addthis:title="<?php the_title(); ?>" ></a> <a class="addthis_button_email" addthis:url="<?php the_permalink(); ?>" addthis:title="<?php the_title(); ?>" ></a> </div>
        </div>
      </div>
      </div>
      <?php // END Social Icons ?>
    </div>
    <?php // END Top Story Card ?>

  </div>
<script language="javascript" type="text/javascript">

function initAddThis()
     {
          addthis.init('.addthis_toolbox')
          addthis.toolbox('.addthis_toolbox');

     };
     // After the DOM has loaded...
     initAddThis();

</script>

FYI, I checked to make sure the http://staging.cudenvertoday.org/wp-admin/admin-ajax.php file is on the server, and it is.