I've updated the angular using the following commands: npm update -g, npm upgrade -gand now I got that error on using ng serve.
The "@angular/compiler-cli" package was not properly installed.
Error: The "@angular/compiler-cli" package was not properly installed.
at Object.<anonymous> (/Users/lechucico/Documents/LegacyLife/node_modules/@angular/cli/node_modules/@ngtools/webpack/src/index.js:14:11)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)
at Function.Module._load (module.js:458:3)
at Module.require (module.js:513:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/Users/lechucico/Documents/LegacyLife/node_modules/@angular/cli/tasks/eject.js:10:19)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)
at Function.Module._load (module.js:458:3)
at Module.require (module.js:513:17)
at require (internal/module.js:11:18)
node_modulesfolder...