I'm using FTB Infinity Evolved but for some reason when I created the dragon dimlet, no dragons are spawning. I've tried everything which included restarting the server, changing the spots of the dimlet and adding terrain/biome dimlets. None are working.
The dragons simply aren't there.

Can you give more information? Logs? What kind of other dimlets you were using?

Hey, thanks for the reply. And sorry for getting back late.
We were just using the dimlet for the dragon, and it still wasn't working. Then we tried adding a biome and terrain dimlet but still nothing.

I'm just going to do this again and show you the logs, so give me like 5-10 minutes.

https://pastebin.com/djGhp1n0

Close as 1.7.10 is no longer supported. If this continues to be a bug on 1.12 or newer, please open a new issue.