The mod Exotic Industries (0.5.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event exotic-industries::on_player_selected_area (ID 51)
exotic-industries/scripts/control/knowledge_system.lua:703: attempt to index field '?' (a nil value)
stack traceback:
exotic-industries/scripts/control/knowledge_system.lua:703: in function 'scan_artifact'
exotic-industries/scripts/control/knowledge_system.lua:858: in function 'on_player_selected_area'
exotic-industries/control.lua:105: in function <exotic-industries/control.lua:103>