After installing Hephaestus, I started getting this error. I realized that it is caused by broken crafts in Hephaestus, in which the ingredients are not specified. I tried deleting them, but it didn't help. The weird thing is that the error doesn't always appear. I think it's because Hephaestus sometimes loads earlier or later than the KubeJS crafts. I downloaded Hephaestus from here: https://github.com/Argent-Matter/TinkersConstruct/releases/tag/3.6.0%2B5.
#Strange error when using Tinker's Construct (Hephaestus)
lucid mortar
mystic jasperBOT
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short snowBOT
Paste version of server.log from @lucid mortar
gray kettle
oh dnono don't use that
it's broken to hell and back
it's also archived, and i'm not developing it anymore
lucid mortar
It's very sad. Maybe there are some good alternatives?
median ginkgo
The closest thing I found is Forgero:
https://www.curseforge.com/minecraft/mc-mods/forgero
lucid mortar
Thanks, I'll try that.