Error loading mod: scienceception/main.lua:498: attempt to index local 'intermediate_tech' (a nil value)
stack traceback: scienceception/main.lua:498: in function 'update_data' scienceception/data-final-fixes.lua:4: in main chunk
I found what probably caused the bug. Could you tell me what mod you're playing with that change the tech tree, labs or science pack? It will allow me to test properly when I fix it.
I've made released 1.2.1. That should allow the game to load. Even if it loads, if you see anything weird, let me know. I don't know what configuration you had to bring the mod in a state that caused that bug.