Mesh paint Mode can't find texture for Non-Nanite meshes

Watch the licensee description of this issue here - [Link Removed]
(Note, this occurs with their plugin but also with our built in Mesh Paint mode)

Download and launch the licensee provided project - [Link Removed]

Navigate to the same mesh highlighted in the video and attempt to use the mesh texture paint tool as shown, this options for the available textures will not appear and it will not be possible to paint to the mesh.