Copilot payment page not working

[jmgasper]

To reproduce

In prod, try to add a copilot payment. An Invalid request parameters error is shown in the UI:

In the logs, I see:

2019-01-06T22:43:25.375337+00:00 heroku[router]: at=info method=POST path="/api/v1/payments/copilot/" host=x.topcoder.com request_id=a526a1e9-08cc-4503-ba06-a148ea8e2c91 fwd="123.243.195.143" dyno=web.1 connect=0ms service=5ms status=302 bytes=334 protocol=https
2019-01-06T22:43:25.510548+00:00 app[web.1]: Error: Can't set headers after they are sent.
2019-01-06T22:43:25.510567+00:00 app[web.1]: at validateHeader (_http_outgoing.js:491:11)
2019-01-06T22:43:25.510568+00:00 app[web.1]: at ServerResponse.setHeader (_http_outgoing.js:498:3)
2019-01-06T22:43:25.510571+00:00 app[web.1]: at ServerResponse.header (/app/node_modules/express/lib/response.js:730:10)
2019-01-06T22:43:25.510572+00:00 app[web.1]: at ServerResponse.send (/app/node_modules/express/lib/response.js:170:12)
2019-01-06T22:43:25.510574+00:00 app[web.1]: at ServerResponse.json (/app/node_modules/express/lib/response.js:256:15)
2019-01-06T22:43:25.510575+00:00 app[web.1]: at method.then (/app/src/common/helper.js:119:15)
2019-01-06T22:43:25.510578+00:00 app[web.1]: at <anonymous>
2019-01-06T22:43:25.692474+00:00 app[web.1]: error: Error happened in CopilotPaymentController#getAll
2019-01-06T22:43:25.692479+00:00 app[web.1]: ValidationError: [object Object] {
2019-01-06T22:43:25.692484+00:00 app[web.1]: "query": {
2019-01-06T22:43:25.692486+00:00 app[web.1]: "sortBy" [1]: -- missing --
2019-01-06T22:43:25.692487+00:00 app[web.1]: },
2019-01-06T22:43:25.692489+00:00 app[web.1]: "topcoderUser": {
2019-01-06T22:43:25.692491+00:00 app[web.1]: "handle": "ghostar",
2019-01-06T22:43:25.692492+00:00 app[web.1]: "roles": [
2019-01-06T22:43:25.692494+00:00 app[web.1]: "copilot",
2019-01-06T22:43:25.692495+00:00 app[web.1]: "Topcoder User"
2019-01-06T22:43:25.692497+00:00 app[web.1]: ]
2019-01-06T22:43:25.692498+00:00 app[web.1]: }
2019-01-06T22:43:25.692500+00:00 app[web.1]: }
2019-01-06T22:43:25.692501+00:00 app[web.1]:
2019-01-06T22:43:25.692503+00:00 app[web.1]: [1] "sortBy" is required
2019-01-06T22:43:25.692505+00:00 app[web.1]: at Object.exports.process (/app/node_modules/joi/lib/errors.js:181:19)
2019-01-06T22:43:25.692507+00:00 app[web.1]: at internals.Object._validateWithOptions (/app/node_modules/joi/lib/types/any/index.js:651:31)
2019-01-06T22:43:25.692510+00:00 app[web.1]: at module.exports.internals.Any.root.validate (/app/node_modules/joi/lib/index.js:121:23)
2019-01-06T22:43:25.692511+00:00 app[web.1]: at module.exports.internals.Any.root.attempt (/app/node_modules/joi/lib/index.js:150:29)
2019-01-06T22:43:25.692513+00:00 app[web.1]: at Object.serviceMethodWithValidation [as getAll] (/app/src/common/helper.js:88:30)
2019-01-06T22:43:25.692514+00:00 app[web.1]: at getAll (/app/src/controllers/CopilotPaymentController.js:31:50)
2019-01-06T22:43:25.692516+00:00 app[web.1]: at controller.(anonymous function) (/app/src/common/helper.js:117:7)
2019-01-06T22:43:25.692518+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692519+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/route.js:137:13)
2019-01-06T22:43:25.692521+00:00 app[web.1]: at actions.push (/app/src/app.js:92:16)
2019-01-06T22:43:25.692522+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692524+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/route.js:137:13)
2019-01-06T22:43:25.692525+00:00 app[web.1]: at actions.push (/app/src/app.js:78:16)
2019-01-06T22:43:25.692527+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692529+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/route.js:137:13)
2019-01-06T22:43:25.692530+00:00 app[web.1]: at actions.push (/app/src/app.js:53:7)
2019-01-06T22:43:25.692532+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692533+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/route.js:137:13)
2019-01-06T22:43:25.692535+00:00 app[web.1]: at Route.dispatch (/app/node_modules/express/lib/router/route.js:112:3)
2019-01-06T22:43:25.692536+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692538+00:00 app[web.1]: at /app/node_modules/express/lib/router/index.js:281:22
2019-01-06T22:43:25.692540+00:00 app[web.1]: at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12)
2019-01-06T22:43:25.692541+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/index.js:275:10)
2019-01-06T22:43:25.692543+00:00 app[web.1]: at cookieParser (/app/node_modules/cookie-parser/index.js:70:5)
2019-01-06T22:43:25.692544+00:00 app[web.1]: at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)
2019-01-06T22:43:25.692546+00:00 app[web.1]: at trim_prefix (/app/node_modules/express/lib/router/index.js:317:13)
2019-01-06T22:43:25.692547+00:00 app[web.1]: at /app/node_modules/express/lib/router/index.js:284:7
2019-01-06T22:43:25.692549+00:00 app[web.1]: at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12)
2019-01-06T22:43:25.692550+00:00 app[web.1]: at next (/app/node_modules/express/lib/router/index.js:275:10)
2019-01-06T22:43:25.692552+00:00 app[web.1]: at Immediate._onImmediate (/app/node_modules/express-session/index.js:489:7)
2019-01-06T22:43:25.692554+00:00 app[web.1]: at runCallback (timers.js:814:20)
2019-01-06T22:43:25.692555+00:00 app[web.1]: at tryOnImmediate (timers.js:768:5)
2019-01-06T22:43:25.692557+00:00 app[web.1]: at processImmediate [as _immediateCallback] (timers.js:745:5)