How to fix an error when creating a server?

Question

Node.js

After entering the command npm run dev, this error appears ->
C:\Users\yakoTa\Desktop\pepelats.pro\node_modules\webpack-dev-middleware\lib\context.js:95
context.compiler.hooks.invalid.tap( 'WebpackDevMiddleware', invalid);
TypeError: Cannot read property 'invalid' of undefined
at ctx (C:\Users\yakoTa\Desktop\pepelats.pro\node_modules\webpack-dev-middleware\lib\context.js:95:26)
at wdm (C:\ Users\yakoTa\Desktop\pepelats.pro\node_modules\webpack-dev-middleware\index.js:46:19)
at Object. (C:/Users/yakoTa/Desktop/pepelats.pro/server/index.js:20:11)
at Module._compile (module.js:652:30)
at loader (C:\Users\yakoTa\Desktop\pepelats .pro\node_modules\babel-register\lib\node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (C:\Users\yakoTa\Desktop\pepelats.pro\node_modules\babel-register\lib\node.js:154:7)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at Object. (C:\Users\yakoTa\Desktop\pepelats.pro\node_modules\babel-cli\lib\_babel-node.js:154:22)
at Module._compile (module.js:652:30)
at Object.Module. _extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497: 3)
[nodemon] app crashed - waiting for file changes before starting...
<-
How to fix it? Help! please

Answer 1

You need to find the line where the attempt to read (set) the invalid property and understand why the object does not exist.