Even i faced this issue for Ionic2 application. When i tried to run the application in ripple browser it was telling "You're almost ready! If you're seeing this page, then you still need to install the NPM Task Runner extension for Visual Studio and run this app again. You can download the extension from:". I struggled a lot to resolve the issue i was using visual studio 2015 Update3. Finally i got a solution issue was with ionic "@ionic/app-scripts". To resolve the issue i fallowed the below steps. 1] execute command "npm uninstall -g ionic" in Command Prompt. 2] Update the version of @ionic/app-scripts to 1.1.4 i.e "@ionic/app-scripts": "1.1.4" in package.json file and Save the file. 3] execute command "npm install -g ionic" in Command Prompt. it will give some warning don't need to wary about it. 4] again i have done Restore Packages by right clicking on the packages.json file. 5] next go...