Last version of haxelib upgrade not working!

My friend wasnt being able to work with openfl so i update mine to the last version (haxelib upgrade on cmd) and now i cant work to, we tried in 3 different pcs and we are getting this error (with our project)

ERROR: There is no asset library named “default”

We need to work help!

Are you using Assets.getBitmapData (or a similar function call) inside of a custom preloader, or at some time before the preloader has finished loading?