This is happening randomly but need further investigation. User will not be able to use MT due to this.
Log:
MT processing error: Error: Translation with Youdao failed. Error: Unknown error: no query for en > zh at Request.preq.post.then (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/src/lib/mt/Youdao.js:105:11) at Request.tryCatcher (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/util.js:16:23) at Promise._settlePromiseFromHandler (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:512:31) at Promise._settlePromise (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:569:18) at Promise._settlePromise0 (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:614:10) at Promise._settlePromises (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:693:18) at Promise._fulfill (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:638:18) at Promise._resolveCallback (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:432:57) at Promise._settlePromiseFromHandler (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:524:17) at Promise._settlePromise (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:569:18) at Promise._settlePromise0 (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:614:10) at Promise._settlePromises (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:693:18) at Promise._fulfill (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/promise.js:638:18) at Request._callback (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/bluebird/js/release/nodeback.js:45:21) at Request.self.callback (/srv/deployment/cxserver/deploy-cache/revs/6f9fcce90a9b2153aef19f4b964ca89ceddbf05e/node_modules/request/request.js:185:22) at emitTwo (events.js:106:13) at Request.emit (events.js:191:7)