Metaphhor Node JS ERROR The header content contains invalid characters

I am receiving following error while using Metaphor. What to do now?

_http_outgoing.js:358
    throw new TypeError('The header content contains invalid characters');
    ^

TypeError: The header content contains invalid characters
    at ClientRequest.OutgoingMessage.setHeader (_http_outgoing.js:358:11)
    at new ClientRequest (_http_client.js:86:14)
    at Object.exports.request (http.js:31:10)
    at Object.exports.request (https.js:199:15)
    at internals.Client.request (/xxx/xxx/xxx/xxx/node_modules/wreck/lib/index.js:158:24)
    at options.beforeRedirect (/xxx/xxx/xxx/xxx/node_modules/wreck/lib/index.js:206:38)
    at formatCookies (/xxx/xxx/xxx/xxx/node_modules/metaphor/lib/index.js:103:28)
    at cookies.forEach (/xxx/xxx/xxx/xxx/node_modules/metaphor/lib/index.js:115:28)
    at Array.forEach (native)
    at Object.beforeRedirect (/xxx/xxx/xxx/xxx/node_modules/metaphor/lib/index.js:111:25)
    at ClientRequest.onResponse (/xxx/xxx/xxx/xxx/node_modules/wreck/lib/index.js:204:24)
    at ClientRequest.g (events.js:291:16)
    at emitOne (events.js:96:13)
    at ClientRequest.emit (events.js:188:7)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:474:21)
    at HTTPParser.parserOnHeadersComplete (_http_common.js:99:23)

I have also checked this but don't find exact solution for Metaphor.

via user54858