With no other mods (no SA):
"Failed to load mods: Error in assignID: item with name 'broken-letter' does not exist.

Source: VE-inserter-fix (recipe)."

[DELETED]

Fixed in version 1.3.1.....

I should have caught this one in testing tbh, but I made the change that caused this after I did my testing with the spoiling letters setting disabled, so I didn't notice the issue. Sigh. Thank you for bringing it to my attention, at least; it should be good now >w<

Oh that was fast. On a more minor note, something is wrong with the new void decompiler, as the name shows: Unkown key: "technology-name.letter-voiding", which I suppose is a missing entry in the English localisation data?

Yep that's from a typo on my part... Argh! This is fixed in version 1.3.2 ;w;