The whole category for packing and unpacking crates seems to be missing from all my assemblers, and the tooltip lists no machines that can pack/unpack crates (not even the player).
Is there some kind of log I can look into to maybe find out which of my mods causes this? (This is most definitely not this mod's fault as my modlist is large enough for me to not be able to just casually disable the mods 1 by 1 - but maybe there is a proper error log or something I haven't found yet)

If you open recipe in factoriopedia.
Does it have any machine under it?

Like diesel assembling machine

Nope. I had a similar problem previously with a module added by a mod that couldn't be added to anything. I probably have some mod that changes stuff about assemblers really late in the load order ,_,

Hi! I just updated your mod and you already fixed it o.o
May your resource patches run deep and your biters be few. I didn't even think it would be possible to fix it that quickly with those vague information I had v.v

Hi! I just updated your mod and you already fixed it o.o
May your resource patches run deep and your biters be few. I didn't even think it would be possible to fix it that quickly with those vague information I had v.v

Someone DMed me with game save on discord with similar issue, so I managed to figure it out. I am happy that it seems to be same problem, and that it works properly now :D