npm run dev Error:This relative module was not found:

[zxj669887072]

G:\newVue-Cli\webpack4-demo-master> npm start

webpack4-test@1.0.0 start G:\newVue-Cli\webpack4-demo-master npm run dev

webpack4-test@1.0.0 dev G:\newVue-Cli\webpack4-demo-master webpack-dev-server --inline --progress --config build/webpack.dev.conf.js

                                            98% after emitting CopyPlugin

ERROR Failed to compile with 1 errors 17:40:12

This relative module was not found:

• ./src/main.js in multi ./node_modules/_webpack-dev-server@3.1.5@webpack-dev-server/client?http://localhost:8080 (webpack)/hot/dev-server.js ./src/main.js

[dengdan99]

i have same problem, how to fix it ?