True that one is fully missing (octane can't use instanced images), it also argues about files which are in folder like "Plaster_pointydirectional_512_d.tga" but loader can't see them without manual retargeting (50+ clicks to find it for every popup). I guess you used that on some model and it got saved as Absolute path instead relative so it's problem for location that's not locally/at your network.
Try to disable/hide your network drive/share temporarily and load this scene from different location and you will see how many times it asks about texture regardless of it being in folder of Package scene. Sadly LWO files still save lot of stuff as Absolute paths and Package scene don't go into LWO file to change that, it just collects data form multiple places.
BUT either way, important part is that Juan did replicate this problem so hopefully he can fix this BUG

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