Simpleoffscreen example doesn't work on OpenGL Runtime

Simpleoffscreen example from Runtime 2 fails to load scene resource on OpenGL Runtime:

qt3ds.perf_info: Case-insensitive matching with file: .\barrel\meshes\Barrel.mesh
qt3ds.internal_error: Failed to find file: .\barrel\meshes\Barrel.mesh
qt3ds.internal_error: Searched path:
<redacted>/qt3dstudio/src/Runtime/ogl-runtime/build-examples-Desktop_Qt_5_12_3_clang_64bit-Debug/simpleoffscreen/simpleoffscreen.app/Contents/MacOS,:,:
qt3ds.warning: Failed to load mesh: .\barrel\meshes\Barrel.mesh
qt3ds.warning: Failed to load image: .\maps\barrel_barrel_Emissive.png
qt3ds.warning: Failed to load image: .\maps\barrel_barrel_Specular.png
qt3ds.warning: Failed to load image: .\maps\barrel_barrel_Diffuse.png
qt3ds.warning: Failed to load image: .\maps\barrel_barrel_Normal.png