When calculating on machines with fluid, e.g. chemical plants. in 2.1.22

The mod Production Rates Calculator Extreme (0.4.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event sw-rates-calc-extreme::on_player_selected_area (ID 58)
LuaFluidPrototype doesn't contain key fluid.
stack traceback:
[C]: in function 'index'
__sw-rates-lib/configurations/crafting-machine.lua:109: in function 'get_fluidbox'
sw-rates-lib/configurations/crafting-machine.lua:125: in function 'get_fluid_selected_input_temperature'
sw-rates-lib/configurations/crafting-machine.lua:569: in function 'get_from_entity'
sw-rates-lib/scripts/configuration.lua:658: in function 'get_from_entity'
sw-rates-calc-extreme/scripts/sheet.lua:137: in function 'build_from_entities'
sw-rates-calc-extreme/control.lua:48: in function <sw-rates-calc-extreme/control.lua:19>

Hm.. I guess the issue is in sw-rates library, not here. get_fluid_filter() is now returning LuaFluidPrototype? directly.

https://github.com/SWeini/sw-rates/pull/66

Fixed in sw-rates-lib 0.5.7

Don't worry, most bugs in the library are reported against the GUI mod, the library is not something users are aware of, it's just an implementation detail.