Error - Cannot find module '@angular-devkit/core' while running ng serve

When you create Angular Project with Angular CLI and want to run your angular application using “ng serve” command you might see the following error “Error – Cannot find module ‘@angular-devkit/core'”

Solution

To resolve “cannot find module ‘@angular-devkit/core'” error try the following steps

Run the following npm update command

npm update -g @angular/cli

Then check whether Angular CLI version of your local (package.json of your project folder) matching with the global version. If not open the package.json file and edit the version like following

-----
"devDependencies": {
    "@angular/cli": "1.7.4",
    "@angular/compiler-cli": "^5.0.0",
    "@angular/language-service": "^5.0.0",
    ------

Note: My global version is “1.7.4”, so I had updated local version as “1.7.4” to match the same. Then run the following command

npm install

Then now try running your angular app using “ng serve“. Hope this solves your issue 🙂

Further Learning

References

Angular documentation