Ionic2 InAppBrowser install

I try install InAppBrowser in command line

ionic plugin add cordova-plugin-inappbrowser

and command line still stop at

Fetching plugin “cordova-plugin-inappbrowser@1.7.0” via npm

not build it

What should i do???

Maybe juste tap “Enter” on your keyboard. Sometimes it works for me when a task seems pending (in cmd)