FNEI mod. All recipes for items and usage for them.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
I found this error on Sulfur production when playing with bob & angel.
FNEI shows a "Sulfur processing" technology. But that technology is not on the technology tree.
Screenshots: https://imgur.com/a/CUnlK
Thanks for your feedback.
Please, provide a link to your modpack or at least a list of mods so that I can check and fix this problem in the next versions