The user created the page in the main namespace by accident. When trying to move it to the userspace, I get the error message:
You do not have permission to move this page, for the following reason:
The desired destination uses a different content model. Can not convert from wikitext to JavaScript.
This is nonsensical, since it is possible to enter everything on JS pages anyway, also wikitext.
Version: 1.22.0
Severity: normal