You're running Version 6.95b - 03-Apr-2019 of the alt-dashboard.
It had <span class="ajax" id="ajaxntimess"> </span>
<script type="text/javascript"><!--
document.write(' <small><i>(<span id="ajaxcounter">0</span> sec ago)</i></small>');
//--></script>
for the counter.
The current 6.95h version has <span class="ajax" id="ajaxntimess"> </span>
<small><i>(<span id="ajaxcounter">0</span> <?php langtrans('sec ago'); ?>)</i></small>
instead.
Try changing that area and see if it fixes that issue. Updating to the 6.95h version would also be a good idea (along with the other PHP scripts in that distribution+ajaxWDwx3.js)