When having Botania and IC2C installed, it seems that ic2s breaks the render of the botania pylons. They are invisible in the inventory.
When i remove ic2c the pylons in the inventory are visible again.

The version of the mods i have installed:
Baubles-1.12-1.5.2
Botania r1.10-363
IC2Classic 1.12-1.5.4.5

@PapierZylinder could you provide me the startup log of the game?

Not 100% sure what you mean with startup log, but i guess this should be what you want.
https://pastebin.com/GdEZviLQ

The log between GameStart and main menu. That should be really long.

oh okay, took me a while to find it. Thats the only other file i found. I hope its the correct one this time.
https://pastebin.com/VCZw3MUj

Is this still being worked on?

Yes

Fixed.

The same thing is occurring with Astral Sorcery collector crystals.