Twitter widget on free sites

Hello,

Is the twitter widget not allowed on free sites?

I have the code to embed from twitter but it refuses to display on any of my pages.

I am using code:

<a class="twitter-timeline" href="https://twitter.com/username">Tweets by username</a> <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

But only “Tweets by username” displays. not the widget of tweets.

Thanks

What is your domain?

Hello infinity