Hi Aren,
Unfortunately, they did not include the TTF files inside, they only include the material, prefab and the png image for the font atlas. I realized that they also include the UIFont.cs for the NGUI. The error is as follows:
Attempting to print using an invalid font!
UnityEngine.Debug:LogError(Object)
UIFont:Print(String, Color32, BetterList`1, BetterList`1, BetterList`1, Boolean, SymbolStyle, Alignment, Int32, Boolean) (at Assets/NGUI/Scripts/UI/UIFont.cs:1095)
UILabel:OnFill(BetterList`1, BetterList`1, BetterList`1) (at Assets/NGUI/Scripts/UI/UILabel.cs:643)
UIWidget:UpdateGeometry(UIPanel, Boolean) (at Assets/NGUI/Scripts/Internal/UIWidget.cs:711)
UIPanel:LateUpdate() (at Assets/NGUI/Scripts/UI/UIPanel.cs:1074)