No se pudo encontrar el módulo "@ angular-devkit / build-angular"
Después de actualizar a Angular 6.0.1, aparece el siguiente error en ng serve: Could not find module "@angular-devkit/build-angular" from "/home/Projects/myProjectName". Error: Could not find module "@angular-devkit/build-angular" from "/home/Projects/myProjectName". at Object.resolve...