The camera is shaking in this scene due to floating precision problems. Your camera is too far from the center of the scene, and the focal length is too long. Octane works using single precision floating maths, that can't manage such large numbers with enough precision.
Why do you have this kind of camera setup? If you need an orthographic projection you can set the camera projection to orthographic, to place the camera closer to the objects and avoid this problem.
Computer Graphics Software Developer
Octane plugin development and support: LightWave and Houdini