Version Information

Forge version: 1.12.2-14.23.2.2642 or higher
Botania version: Botania r1.10-353

Further Information

Link to crash log: https://gist.github.com/leftyde/8e6abcde5767e4c9fdec53c73efc6fb6
Steps to reproduce:

1. Start Game
2. crash...

What I expected to happen:
Launch Minecraft
What happened instead:
Crash

Does it happen with just botania and new forge?

I didn't try

Okay, with only botania and baubles it doesn't crash. weird :/

I have the same problem, and now RFTools requires forge 2645.

I also had this problem however I just updated all my mods and upgraded to the latest forge (2654) and it loaded! So whatever mod was causing this fixed their problem from my perspective. Is it fixed for everyone else?

guys, found it thanks to FTB Discord. It's Advanced Rocketry! Update should be out by now.

Hmm, no it's not, I don't have advanced rocketry and it's still crashing for me.

Modlist: list.txt

can we re-open the issue? I'm still getting it.

since it's solved for OP, open a new issue and attach your own log to it