SyntaxError: Unexpected end of JSON input

[Inversion-NL]

SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at Request._callback (/node_modules/wundergroundnode/lib/wundergroundnode.js:138:49)
at Request.self.callback (/node_modules/request/request.js:199:22)
at emitTwo (events.js:125:13)
at Request.emit (events.js:213:7)
at Request.<anonymous> (/node_modules/request/request.js:1036:10)
at emitOne (events.js:120:20)
at Request.emit (events.js:210:7)
at IncomingMessage.<anonymous> (/node_modules/request/request.js:963:12)
at emitNone (events.js:110:20)
at IncomingMessage.emit (events.js:207:7)
at endReadableNT (_stream_readable.js:1059:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickCallback (internal/process/next_tick.js:180:9)