edited. sorry for the first time.
2. Please test BYG on its own to confirm whether or not this is a mod conflict.
works fine by it's own
Mod conflict? If so, please clarify which mod is conflicting!
I'm not sure .. maybe biomesoplenty or betterend(forge) both last versions

Logs
debug : too large , sorry
latest : https://paste.ee/p/CsUNy

API/Modloader
Forge

Describe the bug
What is the bug? Where/How does it occur? etc.
No nether biomes

To Reproduce
Provide step by step instructions
Enter nether ./locatebiome
Expected behavior
A clear and concise description of what you expected to happen.
Spawn nether biomes
Screenshots/Videos
If applicable, add screenshots/video to help explain your problem.
https://imgur.com/a/KnDJVzQ

You didnt answer whether or not you have other mods present and it seems to me you didnt test byg in an isolated instance. Andddd you didnt give me any sort of logs. You've basically left me with 0 information. Provide more details and I'll consider this an issue. For now Im closing this

You didnt answer whether or not you have other mods present and it seems to me you didnt test byg in an isolated instance. Andddd you didnt give me any sort of logs. You've basically left me with 0 information. Provide more details and I'll consider this an issue. For now Im closing this

Updated . Sorry for the first time .

After deleting BOP biomes are spawning in nether and end again .

The problem appears to occur with BOP world type. Tried it in a world with the default type but with BOP and it works fine. Also, it doesn't seem to spawn the hill biomes. I have not tested it with other sub-biomes