Failed to load mods: Cannot Copy, Invalid Prototype: mini-miner-3
stack traceback:
[C]: in function 'error'
kry_stdlib/stdlib/data/data.lua:207: in function 'copy'
mini-machines/func.lua:601: in function 'miniaturize'
mini-machines/data-final-fixes.lua:101: in main chunk

Is this a mod incompability? running a lot of mods so maybe you can point me in the right direction.

Failed to load mods: Cannot Copy, Invalid Prototype: mini-miner-3
stack traceback:
[C]: in function 'error'
kry_stdlib/stdlib/data/data.lua:207: in function 'copy'
mini-machines/func.lua:601: in function 'miniaturize'
mini-machines/data-final-fixes.lua:101: in main chunk

Is this a mod incompability? running a lot of mods so maybe you can point me in the right direction.

woops, I meant to edit that post, not make a new one sorry

Could be, got any mods that add additional electric mining drills? Mini machines works by copying the base entity, including the "next_upgrade" field and then modifying the values to what they should be (which is, "mini-miner-3" instead of "electric-mining-drill-3"

If there's an unsupported mod that adds another tier of mining drills, but isn't called"electric-mining-drill-3", then that entity won't be copied by the script, leading to a missing "mini-miner-3"

I found the conflicting mod, it was Extended Vanilla: Mining & Drills (https://mods.factorio.com/mod/ev-mining-drills)
I removed it from my playset and now it works flawlessly, thanks for the quick help!

Hm, looking into this a bit more, the incompatibility stems from running both Bobs Mining Drills and Extended Vanilla Mining Drills. Running either mod by itself works just fine, and all mini mining drills are properly copied without errors; the error only appears when attempting to run both.

I don't think there's much reason to use both, since they add the same things (bob's only up to tier 4, extended vanilla up to tier 6). Bob's makes more sense to run with the rest of the bob mods suite, while extended vanilla is better suited to running standalone (with or without the rest of the extended vanilla suite)