I don't have the Space-Age DLC, getting the following error message on starting Factorio even though Space-Age is listed as an optional dependency:

[Error while loading entity prototype "y-inserter-smart"(inserter) Belt stacking is disabled and can not be used. Belt stacking requires space-travel.]

Cannot proceed without completely disabling Yuoki Industries(current release), which of course breaks the save.

hmmmm I forgot about that factor. Thanks for reporting

This should be fixed now, sorry about that.

Thanks for keeping this mod alive :)

I'll give it a spin.

There was a moment of panic when I got the error again, but it turns out I had not completed my coffee injection: I had to update the mod. DUH!

It appears that you have fixed the problem. Thanks again! :)

haha!