error after npm install node-uptime,Can't set headers after they are sent.

[cloudcache]

node app.js
Monitor origin started
info - socket.io started
Express server listening on port 80 in development mode
[Error: http://localhost/api/checks/needingPoll resource responded with error code: 404]
Mongoose: pings.ensureIndex({ timestamp: -1 }) { safe: true, background: true }
Mongoose: pings.ensureIndex({ check: 1 }) { safe: true, background: true }
Mongoose: checkevents.ensureIndex({ timestamp: -1, check: 1 }) { safe: true, background: true }
Mongoose: checkhourlystats.ensureIndex({ timestamp: -1, check: 1 }) { safe: true, background: true, unique: true }
Mongoose: checkdailystats.ensureIndex({ timestamp: -1, check: 1 }) { safe: true, background: true, unique: true }
Mongoose: checkmonthlystats.ensureIndex({ timestamp: -1, check: 1 }) { safe: true, background: true, unique: true }
Mongoose: checkyearlystats.ensureIndex({ timestamp: -1, check: 1 }) { safe: true, background: true, unique: true }
Mongoose: taghourlystats.ensureIndex({ timestamp: -1, name: 1 }) { safe: true, background: true, unique: true }
Mongoose: tagdailystats.ensureIndex({ timestamp: -1, name: 1 }) { safe: true, background: true, unique: true }
Mongoose: tagmonthlystats.ensureIndex({ timestamp: -1, name: 1 }) { safe: true, background: true, unique: true }
Mongoose: tagyearlystats.ensureIndex({ timestamp: -1, name: 1 }) { safe: true, background: true, unique: true }
Mongoose: tags.ensureIndex({ name: 1 }) { safe: true, background: true, unique: true }
Mongoose: checks.find({ '$where': 'function () {\n if (this.isPaused) return false;\n if (!this.firstTested) return true;\n var delay = (this.lastTested.getTime() - this.firstTested.getTime()) % this.interval;\n return (Date.now() - this.lastTested.getTime() + delay) >= (this.interval || 60000);\n}' }) { fields: { qos: 0 }, safe: true }

/root/node_modules/node-uptime/node_modules/mongoose/lib/utils.js:410
throw err;
^
Error: Can't set headers after they are sent.
at ServerResponse.OutgoingMessage.setHeader (http.js:724:11)
at ServerResponse.res.setHeader (/root/node_modules/node-uptime/node_modules/express/node_modules/connect/lib/patch.js:59:22)
at ServerResponse.res.set.res.header (/root/node_modules/node-uptime/node_modules/express/lib/response.js:514:10)
at ServerResponse.res.send (/root/node_modules/node-uptime/node_modules/express/lib/response.js:126:10)
at ServerResponse.res.json (/root/node_modules/node-uptime/node_modules/express/lib/response.js:192:15)
at Promise. (/root/node_modules/node-uptime/app/api/routes/check.js:36:11)
at Promise. (/root/node_modules/node-uptime/node_modules/mongoose/lib/promise.js:128:8)
at Promise.emit (events.js:95:17)
at Promise.emit (/root/node_modules/node-uptime/node_modules/mongoose/lib/promise.js:66:38)
at Promise.complete (/root/node_modules/node-uptime/node_modules/mongoose/lib/promise.js:77:20)