Steps to reproduce:
- Be on a browser that has never edited before, and either on an account that has never editor before or be logged out. (e.g. use an incognito window to reproduce easily)
- Go to any user talk page, e.g. https://en.wikipedia.org/wiki/User_talk:Deskana_(WMF).
- Try to force the visual editor to load by adding ?veaction=edit to the end of the URL.
The page will load, and you're presented with the welcome dialogue, but it has no buttons on it. It can be dismissed by pressing escape.