Cannot call method then of undefined

[Mangulomx]

When I want save the fields de my form without nothing.

In the anchor create question

https://quiz2015-miguel.herokuapp.com/quizes/new

if I press button save. It have that show the errors of validation http://stackoverflow.com/questions/31234695/cannot-call-method-then-of-undefined

[kenany]

@Mangulomx The stack trace seems to indicate that this is a bug in your own code and not with Node.js. I think an issue like this is best left to the Stack Overflow community to look at unless it can be demonstrated to be an issue with Node.js core.

[rvagg]

Not the right repo for bugs anyway, try io.js or joyent/node