Well, I was noticing the same thing with my emoncms 9.9.4 after I did upgrade from quite older release.

I noticed same Reference Error as @nuno_faria1 described above, and compared the Console output between working Feeds graphs and non working Dashboard graph.

This fix worked with me, hope others will also have positive results:

  • edit file /var/www/emoncms/Modules/graph/embed.php
  • add below line just after graph.js (you will find that on line 66 of file)
<script language="javascript" type="text/javascript" src="<?php echo $path;?>Lib/moment.min.js"></script>

…so it looks something like on the snapshot.

Reload the page on your browser and things should work. Fix is persistent across reboots.