Put either the sealed artifact tool in the center of the forge or tool part into one of the item slots in the forge
Shift click the other item into the forge
There will be an error in the server log at this point (see below, this does not crash the server) and the items have been duped.
Click again in the same spot or cause an inventory update to show the duped items
Logs: https://paste.ubuntu.com/p/6ZNRCHDcjR/
I assume that when trying to make the artifact unmodifiable, the mod used I18n to get the message that says the tool is not modifiable, but I18n doesn't exist on the server.
This is the issue that describes it: https://github.com/TCreopargh/GreedyCraft/issues/134 Video: https://imgur.com/a/BNzS6wL Text reproducing steps:
Logs: https://paste.ubuntu.com/p/6ZNRCHDcjR/ I assume that when trying to make the artifact unmodifiable, the mod used I18n to get the message that says the tool is not modifiable, but I18n doesn't exist on the server.