ok, i have tried this and is working:
delete the // from the source like this and let the src star with: platform.twitter…hope work for everyone else
<a class="twitter-timeline" data-dnt=true href="https://twitter.com/fjmdesigns" data-widget-id="xxxxxxxxxxxxxxxxxx">Tweets by @fjmdesigns</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>