System Information
Operating system: Windows 10
Graphics card: GeForce 1080

Blender Version
Broken: Blender 2.80 (installed with the installer downloaded 6 Aug 2019 08:17 (UTC -7))
Worked: Blender 2.80 (installed with the installer downloaded 1 Aug 2019)

Short description of error
Attempting to add an image as Reference to an existing file produces an "Unknown Location Error"
Note: I was not able to reproduce in a new file, only in existing ones

Exact steps for others to reproduce the error
Hide existing model and image
Navigate: Add --> Image --> Reference

Attached:
Blend File: Project Boost Level Shapes