Error when placing large templates (maybe)

I tried to place one of the larger templates I made which gave this error:

develop-2951 (x64)stonehearth/lib/build_util.lua:546: assertion failed!stack traceback:
	[C]: ?
	[C]: in function 'assert'
	stonehearth/lib/build_util.lua:546: in function 'unpack_entity_table'
	stonehearth/components/floor/floor_component.lua:104: in function 'load_from_template'
	stonehearth/lib/build_util.lua:112: in function 'load_structure_from_template'
	stonehearth/lib/build_util.lua:120: in function 'load_all_structures_from_template'
	stonehearth/lib/build_util.lua:124: in function 'load_all_structures_from_template'
	stonehearth/lib/build_util.lua:419: in function 'restore_template'
	stonehearth/services/server/build/build_service.lua:1485: in function 'build_template'
	stonehearth/services/server/build/build_service.lua:1476: in function 'cb'
	stonehearth/services/server/build/build_service.lua:1451: in function 'do_command'
	stonehearth/services/server/build/build_service.lua:1475: in function <stonehearth/services/server/build/build_service.lua:1473>

This is the template that caused it

Though I’m not sure it was just the size being the issue, the place I was trying to build wouldn’t allow any large buildings to be placed, either from a template or manually.

Here is the save.
Jump into the building editor, it won’t let you place walls within that area.