Steps to reproduce:
1. On betalabs, enable WikiLove (Special:Preferenes-Editing).
2. Post WikiLove message on a user page. The WikiLove messages will have a reply link:
{F32411379}
3. Click on the reply link - the link disappear and no text box is open.
The Console will display the following error:
```
Uncaught TypeError: Cannot read property 'nextSibling' of null
at Object.addListItem
at CommentController.js.CommentController.setup
at CommentController.js.CommentController.onReplyLinkClick
at HTMLAnchorElement.dispatch
at HTMLAnchorElement.elemData.handle
```
and the warning
```
jQuery.Deferred exception: Cannot read property 'nodeType' of null TypeError: Cannot read property 'nodeType' of null
```
Example page: https://en.wikipedia.beta.wmflabs.org/wiki/User_talk:ET10#A_kitten_for_you!