When I try to play this map on the All The Mods modpack the spawn eggs are names Spawn and don't work any idea why
On the 1.9+ versions(The Challenge 1.2), Mojang changed how spawn eggs work, which caused all 1.8 or earlier (The Challenge 1.1, 1.0) spawn eggs to break. Because the modpack mentioned is for 1.10, that applies. I am currently not able to release a patch update, because of more urgent stuff I have to do, but when I finish with it, I'll update the spawn eggs.
Until then, my suggestion is to summon yourself the spawn eggs from creative mode, then delete the price , then come back to survival.