The entire error for both mods looks like: Error while running setup for recipe prototype "ion-cannon-targeter-mk2-qp-epic" (recipe): Recipe item-product "ion-cannon-targeter-mk2" is not stackable but has a max count of 2.
https://mods.factorio.com/mod/Kux-OrbitalIonCannon
https://mods.factorio.com/mod/Cerys-Moon-of-Fulgora
-- recipes from Cerys Moon of Fulgora
"ancient-structure-repair-part",
"ancient-structure-repair-part-recycling",
"ancient-structure-repair-part-incineration",
-- recipes from Orbital Ion Cannon
"ion-cannon-targeter",
"ion-cannon-targeter-mk2",