Hi,
i've got this error message. And it just seems to appear together with Bioindustries since the last factorio update.

Error while running event Bio_Industries::on_configuration_changed
Error while running event FoodIndustry::script_raised_built (ID 78)
FoodIndustry/calculate.lua:395: attempt to index field 'created_entity' (a nil value)
stack traceback:
FoodIndustry/calculate.lua:395: in function 'handler'
core/lualib/event_handler.lua:47: in function <core/lualib/event_handler.lua:45>
stack traceback:
[C]: in function 'raise_event'
Bio_Industries/common.lua:660: in function 'create_entities'
Bio_Industries/common.lua:462: in function 'restore_missing_entities'
Bio_Industries/control.lua:204: in function 'init'
Bio_Industries/control.lua:273: in function 'handler'
stdlib/stdlib/event/event.lua:342: in function 'pcall'
stdlib/stdlib/event/event.lua:362: in function 'dispatch_event'
stdlib/stdlib/event/event.lua:438: in function 'dispatch'
stdlib/stdlib/event/event.lua:85: in function <stdlib/stdlib/event/event.lua:83>

Maybe you can fix it. I really like both mods.