I have already recorded the question of the question here.
https://www.youtube.com/watch?v=IyD1bZRDaCw

Chance cubes has a built in system that can be accessed through the command /chancecubes schematic create

Thank you very much for helping me!

I saw on youtube that they changed the picture of chancecubes to gif format. Do they rewrite the mod?

Your issues are likely due to the limitations of the schematic tool you are using and not this mod.

Thank you very much, what schematic tool should I use to save?

I see in your video tutorial that ChanceCubes itself has a schematic save tool, but unfortunately I did not find it in the command.