IOS Build Not Completing, Errors?

I have a scene that contains a lot of png sprites, some Unity UI, and some scripts. I am using Unity Personal, and when I try to build my IOS game, it always fails. I try to build it to an empty folder, don't know if that has anything to do with it. The errors I get are Success && actual == (UInt64)size UnityEditor.HostView:OnGUI() Building-Failed to write file: sharedassets1.assets UnityEditor.HostView:OnGUI() Error building Player: Couldn't find player because of unsupported data on target platform I am very annoyed by this and I would greatly appreciate some help, thanks.