I have a good laptop with 6GB GeForce RTX 2060 video card, however, when I clicked at Global with my massive (15 MB) paint collection (file included below), the game freezes before it sucessfully loaded my saved colors, so here is an error screen I have encountered.
Note that I have set it to “High-Performance NVIDIA Processor” in NVIDIA Control Panel instead of Auto-Select due to the presence of an integrated UHD 630 video card.
You could just clear your cache (which deletes all your cars, engines and global paints); that is one way to solve the problem, but is only recommended if you have no intention of keeping any of your existing cars, engines and paints. I do not know of any other means, though.
Update: I have cleared the game cache and saves, it doesn’t help either, and here is a screenshot after game crashes (an error message is not visible this time), where the resolution is reduced to 800 by 600 pixels.