error 404 does not exist or is not visible

[Arturo Ulises Castañeda Estrada]

Hi dan, I get the next error in some WS with any parameter that I introduce. I 
can see the WS in the wicket but in my browser get the same error.


what mean this?


Response Body

no content

Response Code

404

Response Headers

{
  "date": "Wed, 27 Apr 2016 21:49:43 GMT",
  "server": "Jetty(9.3.5.v20151012)",
  "content-length": "0",
  "warning": "199 RestfulObjects action 'findFriendsByUserSubscriptionId' 
either does not exist or is not visible",
  "content-type": "application/json"
}