Is it really the recorded response that you provided as i can see some values like "${users.Ref_mission}" which seems to be a NeoLoad variable?
Also i do not see that "success" in the file you provided and if it was the recorded response i would expect to find it too so i'm confused.
By the looks of it something you are sending the server it doesn't understand. It could be a correlation issue, look at the request you recorded and the request you are sending and compare, there is a button for this is the CheckVU window (request radio button then compare)
