using apigeetool to upload proxy I get 500 error status

[#1]

using apigeetool to upload proxy I get the next error

Error: Error uploading policy: 500 {
  "code" : "beans.OtherValidationError",
  "message" : "Unexpected Validation Error null",
  "contexts" : [ ] 
}

stacktrace:

 at Request._callback (/Users/yuriabeav/workProjects/zooz-payments-api/node_modules/apigeetool/lib/commands/deployproxy.js:399:18)
    at Request.self.callback (/Users/yuriabeav/workProjects/zooz-payments-api/node_modules/request/request.js:186:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (/Users/yuriabeav/workProjects/zooz-payments-api/node_modules/request/request.js:1060:10)
    at emitOne (events.js:77:13)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (/Users/yuriabeav/workProjects/zooz-payments-api/node_modules/request/request.js:980:12)
    at IncomingMessage.g (events.js:260:16)
    at emitNone (events.js:72:20)

whats wrong?

and what is validation error?