** UPDATE ** I did miss a blog on this (with a better answer; link below) **
https://coronalabs.com/blog/2015/09/17/about-app-transport-security-ats/
I may have missed this, but if you are running into this error for you iOS builds,
Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app’s Info.plist file.
after upgrading to iOS9, you can get around the issue temporarily( not a great idea; but a workaround. Link at top for better solutions).
Simply add this to your build.settings:
iphone = { plist = { NSAppTransportSecurity = { NSAllowsArbitraryLoads = true } , }, }