Howdy. Adding Cerys to my modlist is causing Factory Planner to crash. No comment as to who is to blame. I'm starting here since Factory Planner has been stable with my 30+ mods for the last month. It occurs on loading a save or creating a new game.

The mod Factory Planner (2.0.16) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event factoryplanner::on_init()
__factoryplanner__/backend/handlers/generator_util.lua:46: attempt to index field '?' (a nil value)
stack traceback:
    __factoryplanner__/backend/handlers/generator_util.lua:46: in function 'combine_identical_products'
    __factoryplanner__/backend/handlers/generator_util.lua:110: in function 'format_recipe'
    __factoryplanner__/backend/handlers/generator.lua:444: in function 'generate'
    __factoryplanner__/backend/handlers/prototyper.lua:103: in function 'build'
    __factoryplanner__/backend/init.lua:217: in function <__factoryplanner__/backend/init.lua:204>

Factory Planner is failing to account for https://lua-api.factorio.com/latest/concepts/ResearchProgressProduct.html, a 2.0 feature which I believe Cerys is the first mod to use (given a working version was only introduced four days ago.)

I would appreciate if you reported this to them!

FYI: https://github.com/ClaudeMetz/FactoryPlanner/issues/458