1. I wish to test datatable example
   2- npm install
   3- ng server -o

message error:
Unable to find "@angular/cli" in devDependencies.

Please take the following steps to avoid issues:
"npm install --save-dev @angular/cli@latest"

@angular/compiler-cli@4.3.6 requires typescript@'>=2.1.0 <2.4.0' but 2.4.2 was found instead.
Using this version can result in undefined behaviour and difficult to debug problems.

Please run the following command to install a compatible version of TypeScript.

npm install typescript@'>=2.1.0 <2.4.0' 

To disable this warning run "ng set warnings.typescriptMismatch=false".

Cannot read property 'config' of null
TypeError: Cannot read property 'config' of null
at Class.run (C:\Users\miguel\AppData\Roaming\npm\node_modules@angular\cli\tasks\serve.js:51:63)
at check_port_1.checkPort.then.port (C:\Users\miguel\AppData\Roaming\npm\node_modules@angular\cli\commands\serve.js:123:26)
at
at process._tickCallback (internal/process/next_tick.js:188:7)

D:\datos\bajados\angular-development-with-primeng-master\angular-development-with-primeng-master\chapter9\crud-datatable>