Out of the blue I can't build to IOS target anymore I have the error: An asset is marked with HideFlags.DontSave but is included in the build: Asset: 'Library/unity editor resources' Asset name: RobotoMono-Regular (You are probably referencing internal Unity data in your build.) UnityEngine.GUIUtilityrocessEvent (int,intptr,bool&) I've changed nothing and Unity 2021.3.20f1 refuses to build anymore, I've been stuck for a week and can't even find where the Unity/Library RobotoMono-Regular is. Any ideas guys as I am really stuck, I've tried creating a new scene and copying everything over but that didn't work. I've tried deleting the Library and Obj folders and letting unity rebuild. I've tried re installing unity all to no avail.