Update: It looks like if I open the .zip file of the mod and change line 3 of control.lua from this:
Position = require 'stdlib/stdlib/area/position'
to this:
Position = require 'kry_stdlib/stdlib/area/position'
(and then remove the redundant copy of the 0.2.2 .zip file from the 0.2.3 folder)
and recompress it, it seems to let me start the server after, however I cannot connect to my game because I think the game client downloads the mod from here when I try to sync mods and join, and I guess the one from here still has the wrong value.