Errors in send reply tweet cause Fatal error

[tomasholderness]

If error sending reply tweet occurs:

2017-09-22T17:51:29.122Z - info: Logged new invitee - @nopemartians
2017-09-22T17:51:29.943Z - error: uncaughtException: err is not defined, ReferenceError: err is not defined
    at /home/ubuntu/cognicity-reports/BaseTwitterDataSource/BaseTwitterDataSource.js:208:111
    at Request._callback (/home/ubuntu/cognicity-reports/gnip-powertrack/node_modules/twitter/lib/twitter.js:212:14)
    at Request.self.callback (/home/ubuntu/cognicity-reports/gnip-powertrack/node_modules/request/request.js:188:22)
    at emitTwo (events.js:106:13)
    at Request.emit (events.js:191:7)
    at Request.<anonymous> (/home/ubuntu/cognicity-reports/gnip-powertrack/node_modules/request/request.js:1171:10)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at IncomingMessage.<anonymous> (/home/ubuntu/cognicity-reports/gnip-powertrack/node_modules/request/request.js:1091:12)
    at IncomingMessage.g (events.js:292:16)
2017-09-22T17:51:29.943Z - error: Fatal error: Application shutting down