Licenses Create Schematics is open source, and is licensed under the MIT License, see the License for more information.

When using this mod in a build that you want to reproduce with a Create Schematic, the schematic cannot be used and causes a stack trace to be printed by Create with a warning. Specifically this seems ...

Schematics in Minecraft can be placed using the Litematica mod by Masady. It is an extensive add-on that offers the ability to visualize and place 3D holograms of structures to aid your builds.

Litematica is one of the most useful Minecraft mods for builders. It adds a ton of extra functionality to creative mode, including area cloning, moving, filling, and deleting.