The following mods could not be loaded: ...tors-space-age__/prototypes/repltable/table-creation.lua:136: attempt to index field '?' (a nil value)
stack traceback:
...tors-space-age__/prototypes/repltable/table-creation.lua:136: in function 'repltech_item_table'
...eplicators-space-age__/prototypes/replications/yuoki.lua:21: in main chunk
[C]: in function 'require'
dark-matter-replicators-space-age/data.lua:65: in main chunk

I have not fully tested this fix but it does allow the game to load. I have not researched the Dark Matter in my game yet so I do not know if this somehow breaks anything in game.

Try replacing the function on line 136 of prototypes/repltable/table-creation.lua with the below function.
This makes it so Dark Matter stops trying to load missing recipes into the item table causing a nil issue later.

Original function from line 136

function repltech_item_table(item_table, category, prerequisites, overrides)
overrides = overrides or {}
local name = overrides.internal_name or
item_table[1].overrides.internal_name or item_table[1].name
repl_table[name] = {
name = name,
category = repltypes[category],
items = item_table,
prerequisites = replsub_prereq(prerequisites),
overrides = overrides,
from = "repltech_item_table",
}
end

Replacement function:

function repltech_item_table(item_table, category, prerequisites, overrides)
overrides = overrides or {}

    if not item_table or not item_table[1] then
            log("DMR: repltech_item_table skipped because item_table is empty or nil")
            return nil
    end

    local first_item = item_table[1]
    local first_overrides = first_item.overrides or {}

    local name = overrides.internal_name or first_overrides.internal_name or first_item.name

    if not name then
            log("DMR: repltech_item_table skipped because no valid name could be determined")
            return nil
    end

    repl_table[name] = {
            name = name,
            category = repltypes[category],
            items = item_table,
            prerequisites = replsub_prereq(prerequisites),
            overrides = overrides,
            from = "repltech_item_table",
    }

    return repl_table[name]

end