Add Mod Version compatibility issue

I need CustomMobSpawner-3.11.4 for use the mod creatures please, the problem is that CustomMobSpawner-3.11.4 is not in aternos and i need that version to see the animals of mod creatures because the version of aternos dont let me see the animals. Ty

This guy have the right version, i did it and is safe, maybe you can added from there?https://www.youtube.com/watch?v=NBsGTE5sv7o

any ideas of how can i see the animals of mod creatures on my server of minecraft 1.12.2?