Trying to build the adventurous gnome always ends in the project being scrapped

I’ve tried to build the “”onward” the adventurous gnome” five times with at least two different sims, and it always ends in the project having to be scrapped. Everything seems like it’s going fine, but then right when the project should be completing, they stop working on it and the only option is to scrap the project.

I hope you’ll fix this. It looks like the final product is a gnome in a little boat and I want to make it, it looks adorable.