So I bought a spawner today and did everything I needed to get it to work. However, it didn't...
I then learned that at warp mob and animals mobs weren't spawning there. I hope this gets fixed soon.

 

Never mind they are working again, please close this thread.

 

It has been decided that mob spawning was to be disabled due to the shopkeeper plug-in not being updated.

 

Well they are spawning again.