Integration Unity as a library in native Android app

Fresh project on MacOS High Sierra and hitting Invalid build path with
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

4857479--467549--upload_2019-8-14_13-4-6.png

Note: iOS plugin works flawless. Have never run into this issue before. I’m building with the unchange Unity project provided. Similar thread without resolution: UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Update: I’m able to export to an external drive, but still interested in why my main drive doesn’t support the export (I’ve tried exporting to many locations, including the top level “/”). Permissions shouldn’t be a problem since I’ve never had trouble with Unity writing to my drive before. Perhaps it’s a case-sensitivity issue? Using Apple’s apfs as the filesystem type.