Nothing new shows for me so I can’t debug. It jsut appeared having a look
Your top widget, no HTML appears.
Something stripped it out.
Is this a wordpress.com blog? iirc those block some iframes from being used.
Your second widget
It’s not processing/displaying properly as HTML.
You have a Wordpress issue not a Twitch issue.
The correct parent for this site is windsofresub.com but I would spefify two parents one of windsofresub.com and www.windsofresub.com
<iframe
src="https://player.twitch.tv/?channel=reanimee&parent=windsofresub.com&parent=www.windsofresub.com"
height="<height>"
width="<width>"
allowfullscreen>
</iframe>