Hi!
I'm sorry, but while developing web application often had get message "Failed to load response data" on post queries in DevTools -> Network -> Tab Response (http://www.enlightenment.org/ss/e-5756f2c1851a83.31230804.jpg).
On this query in DevTools -> Network -> Tab Response (http://www.enlightenment.org/ss/e-5756f335bb4f19.83530913.jpg) there is information about response (in example "content-length:599").
Konstantin