Hi Kirian,
This livery was from before the major FSLabs update, so it was taken down due to being incompatible and not adjusted to the new version.
If you wish to submit a livery request for this livery to be remade on the new paint kit, feel free to send your request here: https://store.inibuilds.com/collections/services/products/realistic-livery-request
Cheers,
Max