The mod FNEI (0.4.5) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event FNEI::on_tick (ID 0)
LuaTechnologyPrototype doesn't contain key prototype.
stack traceback:
[C]: in function 'index'
__FNEI/utils/raw_technologies.lua:27: in function 'create_tech_dependencies'
FNEI/utils/recipe_list.lua:151: in function 'compare'
FNEI/utils/recipe_list.lua:129: in function 'create_equals_recipe_list'
FNEI/utils/recipe_list.lua:41: in function 'get_equals_recipe_list'
FNEI/utils/data_wrapper.lua:10: in function 'hard_load'
FNEI/scripts/events.lua:64: in function <FNEI/scripts/events.lua:63>

Same here

fixed by myself. published as personal fork

awesome kuxynator, thanks!

temporary solution
see RecipeBook => you can get a version from github: https://github.com/raiguard/RecipeBook/tree/v4.0

thanks, kuxynator, great news.
I just posted my issue over there.