Failed to load mods: hot-metals/prototypes/hot-metals.lua:34: attempt to call field 'filter' (a nil value)
stack traceback:
hot-metals/prototypes/hot-metals.lua:34: in function 'createHotVariant'
hot-metals/prototypes/hot-metals.lua:71: in main chunk
[C]: in function 'require'
hot-metals/data-updates.lua:1: in main chunk

Please click "manage mods" and make sure nothing is red and everything is up to date.

i had the same problem, i was able to get it to boot - unsure if works as intended - by adding

require('cf-lib/util/table')

at the beginning of prototypes/hot_metals.lua

i assume this is needed now since it's referencing the .filter function defined in the cf-lib modm, but somehow got missed for this file

Oh. Indeed. Sorry, I'll add that.

Fixed