Thread:TheGrayKirby/@comment-22439-20150902063443/@comment-26037236-20150902085308

They are changing the way they do Infoboxes at the moment, so there are probably glitches with it. When I tried to do what you did, I got the same problem. Try using source mode or use the Classic editor and insert an infobox that way if you know how to.

Rather than hitting the edit button, click on the arrow next to it, and select Classic Editor, and find the Infobox template in the box on the right of the editor. Good luck with it.