If I write the command @build project.schematic then it writes to me:
[Fabritone] Unable to do it. Pausing. resume to resume, cancel to cancel
If I write the command @resume then it writes to me the same.
Version of Minecraft: 1.16.1
Version of Java: 8 Update 251
Version of Fabric: fabric-loader-0.9.0+build.204-1.16.1
OC: Windows 10 Pro 1909 (Build OC 18363.836)