Hi Jejani,
I’m not using a premium theme – made it myself, so pretty basic functionality. Apart from styling your div with the gravatar as a bkg image the way you’ve done it is similar to how I ended up getting it to work. The code I used is:
<?php $authorHash = md5(get_the_author_email());
$authorHash = trim($authorHash);?>
<div class="post-thumb mb-0"><img class="img-thumbnail" src="http://www.gravatar.com/avatar/<?php echo $authorHash; ?>?s=128" width="128" height="128" /></div>
I’ll incorporate styling the div background, however what I’m wondering is why we can’t use the get_avatar function that wordpress provides. I mean it does work, but the quality is terrible!