I was using the given url source on the share button.
But I just played around a little bit. The whole iframe stuff from the share button doesn’t work. This popout thing and =true is not good to work with. I did some non-important changes, design stuff, and changed the url again to https://twitch.tv/xforigens/chat, and that worked. This popout thing and http or https changes wouldn’t load in the chat at all. At some point twitch.tv/channel=xForigens&popout_chat=true would only load in when given https:// at the beginning, but not with http://. And then this suddenly stopped working as well. The iframe didn’t load the source. So I recommend, when facing this issue again, using “https://twitch.tv/(channel)/chat”. Works fine, somehow, as this didn’t work in any of the first tries, but now it does.