iOS9 does not allow cleartext HTTP resouce load since its insecure. This plugin allows to configure temporary exceptions to allow cleartext for development purpose. Do not include this plugin for app approval otherwise your app will be rejected.
Plugin to updates the plist info file for key NSAppTransportSecurity with dict-key NSAllowsArbitraryLoads
In iOS 9 or later, non secured API call returns following error [Error] Failed to load resource: The resource could not be loaded because the App Transport Security policy requires the use of a secure connection.