npm run dev 后报错Module build failed: Error: emitFile is required from module system

ERROR in ./src/images/4-2.png Module build failed: Error: emitFile is required from module system at Object.module.exports (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/file-loader/index.js:9:27) at Object.loader (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/url-loader/dist/index.js:76:19) @ .//css-loader!.//vue-loader/lib/style-rewriter.js?id=data-v-5aa333df!.//less-loader!.//vue-loader/lib/selector.js?type=styles&index=0!./src/page/score/index.vue 6:215-246

ERROR in ./src/images/4-4.png Module build failed: Error: emitFile is required from module system at Object.module.exports (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/file-loader/index.js:9:27) at Object.loader (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/url-loader/dist/index.js:76:19) @ .//vue-loader/lib/template-compiler.js?id=data-v-5aa333df!.//vue-loader/lib/selector.js?type=template&index=0!./src/page/score/index.vue 42:13-44

ERROR in ./src/images/1-2.png Module build failed: Error: emitFile is required from module system at Object.module.exports (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/file-loader/index.js:9:27) at Object.loader (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/url-loader/dist/index.js:76:19) @ .//css-loader!.//vue-loader/lib/style-rewriter.js?id=data-v-40dc09df!.//less-loader!.//vue-loader/lib/selector.js?type=styles&index=0!./src/components/itemcontainer.vue 6:701-729

ERROR in ./src/images/1-1.jpg Module build failed: Error: emitFile is required from module system at Object.module.exports (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/file-loader/index.js:9:27) at Object.loader (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/url-loader/dist/index.js:76:19) @ .//css-loader!.//less-loader!./src/style/common.less 6:938-966

ERROR in ./src/images/4-1.jpg Module build failed: Error: emitFile is required from module system at Object.module.exports (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/file-loader/index.js:9:27) at Object.loader (/Applications/MAMP/htdocs/github-vue-project/vue2-happyfri/node_modules/url-loader/dist/index.js:76:19) @ .//css-loader!.//vue-loader/lib/style-rewriter.js?id=data-v-5aa333df!.//less-loader!.//vue-loader/lib/selector.js?type=styles&index=0!./src/page/score/index.vue 6:64-95 Child html-webpack-plugin for "index.html": Asset Size Chunks Chunk Names index.html 1.47 MB 0 webpack: Failed to compile.