Top mods / LootJS: KubeJS Addon
Not listed
LootJS: KubeJS Addon doesn't list Minecraft 26.3 on Modrinth. The newest release it lists is 26.1.2, on NeoForge.
Open LootJS: KubeJS Addon on Modrinth
This is what the mod's author listed on Modrinth, not a test. A listing doesn't prove a mod runs on your setup, and a missing listing doesn't prove it fails. Versions must match exactly, and files published elsewhere, such as CurseForge, aren't counted.