As my thought, review the nodes in your Blender scene, particularly the ones mentioned in the error messages ('Environment',geometry dash lite 'OCTANE_BLENDER_KERNEL_NODE', 'OCTANE_BLENDER_ANIMATION_SETTING_NODE'). Make sure their configurations are correct and compatible with Octane Blender.

In Blender, for instance, you can use a combination of nodes to isolate and capture reflections on a surface.geometry dash liteYou can make a reflection catcher!

What I usually do is export the model with Octane materials, then manually adjust the materials in Sketchfab's editor.geometry dash liteIt's not as seamless as I'd like, but it gets the job done.