Screenshot
Steps to reproduce:
1.Load a page from http://en.m.wikipedia.beta.wmflabs.org/wiki/
2.Open the page in Edit Source mode first
3.Now go to the Settings icon and try to open the page with Mobile VE
Observed Result:
The following error appears in the console and VE does not open, stays in Edit Source mode:
"TypeError: Cannot set property 'MWMobileContext' of undefined"
Version: unspecified
Severity: normal
Attached: