Adsense code changes, leaves a yellow bar.

First off, I should note this issue is happening on the free wordpress platform. When I copy the adsense code it looks like this:

<script async src=”//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js”></script>
<!– AISide –>
<ins class=”adsbygoogle”
style=”display:inline-block;width:160px;height:600px”
data-ad-client=”ca-pub-3299410755362276″
data-ad-slot=”8377615341″></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>

But when I save it in the text widget it immediately turns to this:

<!– AISide –>
<ins class=”adsbygoogle” style=”display:inline-block;width:160px;height:600px;”></ins>

(adsbygoogle = window.adsbygoogle || []).push({});

And there’s a big yellow block where the ad spot is, with (adsbygoogle = window.adsbygoogle || []).push({}); at the end. I’ve never seen this before.

Can you even use Adsense on the free WordPress?

Thanks