Building wont finish building

building wont finish building
Expected Results:
to finish
Actual Results:
no finish

this is the save with the building that wont finish building
Version Number and Mods in use:
System Information:

might be a stupid question but did you use a template from the old “building system” or did you make it with the new system? I have heard that there is problems using the old one now.

I made it with the new
cant even use the old one anymore. because its gone.