User blog comment:DaNASCAT/Technical Update: April 20, 2016/@comment-25523075-20160421191910/@comment-303594-20160422131742

Kirkburn means "look at the code and examine what could be wrong". Since you are the one who put the code there, it's expected that you should know how it works.

The forums are a good place to ask if you're stuck on JS.

For this error, the code that's wrong is:

What this means is "change the HTML of items of the class username to wgUserName" The HTML on the page that lists who edited is the following: As it has the class username, the HTML is changed by the script to give the user's name instead.

To solve, you'll have to look for a different class. Edit the username Template to use that new class, and the common.js to do likewise.