code is from wiki.latvian.dev/kubejs-farmers-delight

ServerEvents.recipes((event) => {
    event.recipes.farmersdelight.cutting(
        "minecraft:cobblestone",
        "#forge:tools/pickaxes", // tool
        [ // results
            "minecraft:iron_ore",
            {
                item: "minecraft:diamond",
                chance: 0.8
            }
        ],
        "" // sound
    );
});

! [18:31:14] [ERR] server_scripts:script.js:2: Failed to create recipe for type 'farmersdelight:cutting': Custom recipe has to use a single json object argument!

what's your KubeJS Delight version?

hmmm could you post your modlist? and anything else in your server scripts? i can't reproduce this issue in my environment

And there are no other scripts.

what's your KubeJS Delight version?

1.0.1 on 1.19.2 Forge

hmmm could you post your modlist? and anything else in your server scripts?
i can't reproduce this issue in my environment

Actually, it seems like it works on dev env correctly, but outside it doesn't

So I've been playing around with this issue, and I have no clue why this is happening, but I think my current verdict is just to update to kubejs 6.1 when it comes out later today or this week, because it doesn't happen in that version.