How to post HTML Banner on page

Hello-

I am attempting to ad the following promo banner to my sidebar…preferablly under my Instagram Widget. I pasted the code in a text widget, however the widget it blank on the published page.

Please assist.

Thanks so muc.

The code:

<script id=’intercast-banner-185′ src=’//s3.amazonaws.com/static.onintercast.com/campaigns/revolt/banners/185/embed.js’></script>