The constants mod screws with itself, especially if you haven't played recently. It has some faulty code for updating the mod, and there was a slight revision for v0.5.24.
The simplest fix is to manually copy the new "constantsmod.gd" file from the game folder (files/scripts/constantsmoddata) to the constants mod folder in the appdata(i.e. where you added Arics mod folder), and replace the old one.
It's not as fancy as my updated constants mod available on the Discord, though the rest of the patch won't be compatible until Aric finishes his update.