Template Errors: forum_view

1. Illegal string offset 'tag' in /static/forum/library/XenForo/Template/Abstract.php(279) : eval()'d code, line 1542:

   1541: $__compilerVar39 .= '
   1542: 			<li><a href="' . XenForo_Template_Helper_Core::link('tags', $tag, array()) . '" class="tag"><span class="arrow"></span>' . htmlspecialchars($tag['tag'], ENT_QUOTES, 'UTF-8') . '</a></li>
   1543: 		';