Hello if anyone is having troubles launching this I've used ChatGPT to give me to code necessary to fix this mod, I can now successfully launch the game.
In "data-final-fixes.lua" copy this code over the "setResistancePercent" function.

"local function setResistancePercent(entity, resistanceType, setPercent)
if not entity then return 0 end

-- Create resistances table if it doesn't exist
if not entity.resistances then
    entity.resistances = {}
end

-- Find existing resistance
local entityResist = nil
for i = 1, #entity.resistances do
    if entity.resistances[i].type == resistanceType then
        entityResist = entity.resistances[i]
        break
    end
end

-- If we’re just reading the percent
if not setPercent then
    if entityResist then
        return entityResist.percent or 0
    else
        return 0
    end
end

-- If resistance doesn’t exist, add it
if not entityResist then
    entityResist = {type = resistanceType, decrease = 0, percent = 0}
    table.insert(entity.resistances, entityResist)
end

-- Finally, set the new percent
entityResist.percent = setPercent
return entityResist.percent

end"

The code suggested by the ChatGPT is correct, but figuring out where he changed the function wasn't easy, even in such a simple function. It would have been better to include only the lines of code that were being added.

I'll add fix in the next release.

Thanks Dimm, sorry just was a easy fix for me. ^_^'