获取类型错误：在extract.js文件中执行gulp jshint时无法读取null的属性“toString”

在为Polymer 1.0中创建的web应用程序执行gulp时，我遇到以下错误。。我使用了名为akyral details的第三方web组件

/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/src/extract.js:14 file.jshint.extracted=jshintcli.extractfile.contents.toString'utf8' ^ TypeError:无法读取null的属性“toString” at/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/src/extract.js:14:62 在module.exports.u.memoize.Minimatch.nocase/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/src/fileIgnored.js:38:7 在一次彻底的变革中/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/src/extract.js:9:5 在DestroyableTransform._transform/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/src/stream.js:26:15 在DestroyableTransform.Transform.\u read/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/node_modules/through2/node_modules/readable stream/lib/_stream_Transform.js:184:10 在DestroyableTransform.Transform.\u write/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/node_modules/through2/node_modules/readable stream/lib/_stream_Transform.js:172:12 在doWrite/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/node_modules/through2/node_modules/readable stream/lib/_stream_writeable.js:237:10 在writeOrBuffer/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/node_modules/through2/node_modules/readable stream/lib/_stream_writeable.js:227:5 在DestroyableTransform.Writable.write/Users/PVT/Desktop/Sanskar Marathi/node_modules/gulp jshint/node_modules/through2/node_modules/readable stream/lib/_stream_Writable.js:194:11 在PassThrough.ondata_stream_readable.js:540:20 在PassThrough.emit events.js:107:17 在readableAddChunk\u stream\u readable.js:163:16 在PassThrough.Readable.push_stream_Readable.js:126:10 在PassThrough.Transform.push_stream_Transform.js:140:32 在后转换时_stream_transform.js:96:12 在TransformState.afterTransform\u stream\u transform.js:74:12

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请阅读并回答。对不起，我对这一切都不熟悉。。我不知道如何发布正确的问题。。我对编码还不熟悉。。