Uncaught TypeError: str.substr is not a function

[PixelT]

TypeError: str.substr is not a function
    at Function.module.exports.addColorMarkers (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\widget\colorPreview.js:59:21)
    at ComputedValueWidget.getValue (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\widget\ComputedValueWidget.js:34:42)
    at ComputedValueWidget.update (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\widget\AbstractWidget.js:168:71)
    at AbstractWidget.disposable.add.marker.onDidChange.event (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\widget\AbstractWidget.js:41:26)
    at Function.module.exports.Emitter.simpleDispatch (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\event-kit\lib\emitter.js:25:14)
    at Emitter.module.exports.Emitter.emit (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\event-kit\lib\emitter.js:129:28)
    at Marker.module.exports.Marker.emitChangeEvent (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\text-buffer\lib\marker.js:425:20)
    at Marker.module.exports.Marker.update (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\text-buffer\lib\marker.js:366:12)
    at Marker.module.exports.Marker.setProperties (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\text-buffer\lib\marker.js:250:19)
    at matched.forEach.marker (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\index.js:215:28)
    at Array.forEach (native)
    at newMarkers.forEach.item (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\index.js:213:21)
    at Set.forEach (native)
    at markBufferWithAnalyzerData (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\index.js:201:16)
    at Task.analyzer.start.result [as callback] (C:\Users\user\.atom\packages\livestyle-atom\lib\analyzer\index.js:165:13)
    at C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\src\task.js:65:72
    at C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\src\task.js:126:25
    at Function.module.exports.Emitter.simpleDispatch (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\event-kit\lib\emitter.js:25:14)
    at Emitter.module.exports.Emitter.emit (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\node_modules\event-kit\lib\emitter.js:129:28)
    at ChildProcess.<anonymous> (C:\Users\user\AppData\Local\atom\app-1.13.0\resources\app.asar\src\task.js:78:34)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at process.nextTick (internal/child_process.js:744:12)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)