Screenshot
Steps to reproduce:
1.Open a page with VE
2.Open the Categories Dialog box from Settings>Categories
Observed Result:
The error " Uncaught TypeError: Cannot read property 'langlinks' of undefined " appears in the console.
See the screenshot attached.
Test Environment: http://en.wikipedia.beta.wmflabs.org/
Browser: Chrome Version 26.0.1410.65
OS: MAC OS X 10. 8. 5
Page:http://en.wikipedia.beta.wmflabs.org/w/index.php?title=Jan7th&veaction=edit
Version: unspecified
Severity: normal
Attached: