Full py.

Failed to load mods: Kux-SolidifiedFluids/data-final-fixes.lua:29: attempt to index local 'tech_oil_gathering' (a nil value)
stack traceback:
Kux-SolidifiedFluids/data-final-fixes.lua:29: in main chunk

local tech_oil_gathering = data.raw.technology["oil-gathering"]

if py removes the tech “oil-gathering” then i need a replacement tech available in py
but i don't play py. so it's up to you to find one ;-)

this technology is used to early unlock water and crude-oil solidification

    if fluid.name == "water" or fluid.name == "crude-oil" then
        table.insert(tech_oil_gathering.effects, {type = "unlock-recipe", recipe = fluid.name..main_suffix_solid})
        table.insert(tech_oil_gathering.effects, {type = "unlock-recipe", recipe = fluid.name..main_suffix_liquid})
    end

Ok. Since you're reviving lots of old mods, any interest in porting https://mods.factorio.com/mod/logistic-tanks to 2.0?

interesting mod, but I dont need storage tanks (and bots) right now, that's why I'm working on Solidified Fluids ;-)