The mod Orbital Ion Cannon (Space Edition) (3.5.2) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event Kux-OrbitalIonCannon::on_configuration_changed _ Kux-OrbitallonCannon__/control.lua:70: attempt to get length of local 'c' (a
userdata value)
stack traceback:
Kux-OrbitallonCannon
< Kux-OrbitallonCannon
/control.lua:70: in function
/control.lua:55>

strange c should not be userdata, its a table from storage
{ 0, 1, "nauvis", }

can you provide the savegame?, so i can debug this

Did the daily mod updates and OIC now works as expected, no crash on load. False alarm!

there are certainly other bugs you can find ;-)

there are certainly other bugs you can find ;-)

hello, i seem to be having the same error, it began after i saved my game on gleba to go get a high contrast mod (probably unrelated, error still happens without it), also, my autosaves are having the same issue, here is my save game, though it has quite a few mods, and isn't setup well in regards to performance

https://drive.google.com/file/d/1Os0gub616dnv_X8vfpCGHGeQ0udfP6kq/view?usp=sharing
factorio version: 2.0.21

also, i uncommented the print statements you had near where the error was, and here is their output (i currently only have cannons in orbit of nauvis and vulcanus)
OrbitalIonCannon:OnInit
Update cannon force ''player'' {{0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "vulcanus"}, {0, 1, "vulcanus"}, {0, 1, "vulcanus"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}, {0, 1, "nauvis"}}
Update cannon force ''Queue'' {"[LuaEntity: gleba-spawner-small at [gps=-206.6,267.1,gleba]]"}

added a check for if fn was Queue on line 67 and it let me load into the game(no idea if queue is important for anything though):

        for fn,f in pairs(storage.forces_ion_cannon_table) do
            print("Update cannon force ''"..fn.."'' "..serpent.line(f))
            if not string.find(fn,"Queue") then
                for i,c in ipairs(f) do
                    --if not c[3] then --TODO bad argument #2 of 3 to 'index' (string expected, got number) ???
                    --  c[3] = "nauvis" end
                    if #c==2 then
                        --"Update cannon #"..tostring(i).." surface to 'nauvis'")
                        table.insert(c, "nauvis")
                    end
                end
            end
        end

I came up with the same fix when debugging
the error has been there since the beginning ;-)
“Queue” is not data for a force and does not need to be migrated

fixed.
thanks for investigating