TypeError: undefined is not a function
    at calculate (/sites/dev-node/nodejs/1161/node_modules/omega-supreme/supreme.js:173:7)
    at /sites/dev-node/nodejs/1161/node_modules/async/lib/async.js:254:17
    at /sites/dev-node/nodejs/1161/node_modules/async/lib/async.js:203:33
    at /sites/dev-node/nodejs/1161/node_modules/async/lib/async.js:251:21
    at Request.requested (/sites/dev-node/nodejs/1161/node_modules/omega-supreme/supreme.js:168:9)
    at Request.self.callback (/sites/dev-node/nodejs/1161/node_modules/omega-supreme/node_modules/request/request.js:236:22)
    at Request.emit (events.js:98:17)
    at Request.<anonymous> (/sites/dev-node/nodejs/1161/node_modules/omega-supreme/node_modules/request/request.js:1142:14)
    at Request.emit (events.js:117:20)
    at IncomingMessage.<anonymous> (/sites/dev-node/nodejs/1161/node_modules/omega-supreme/node_modules/request/request.js:1096:12)