Can't build due to error

release-811 (x64)
stonehearth/lib/build_util.lua:623: assertion failed!
stack traceback:
[C]: ?
[C]: in function ‘assert’
stonehearth/lib/build_util.lua:623: in function ‘building_is_started’
stonehearth/services/server/build/build_service.lua:239: in function ‘filter_fn’
radiant/modules/terrain.lua:269: in function ‘get_entities_in_region’
stonehearth/services/server/build/build_service.lua:234: in function ‘_merge_blueprints_in_region’
stonehearth/services/server/build/build_service.lua:298: in function ‘_add_floor_type’
stonehearth/services/server/build/build_service.lua:276: in function ‘add_floor’
stonehearth/services/server/build/build_service.lua:148: in function ‘cb’
stonehearth/services/server/build/build_service.lua:1609: in function ‘do_command’
stonehearth/services/server/build/build_service.lua:147: in function <stonehearth/services/server/build/build_service.lua:143>

release-811 (x64)
c++ exception: lua runtime error
stack traceback:

The entire place is made with Insta-build.
Due to most buildings are beign made as templates, but i’d still like to progress it as a town, just as a little project of mine.

Sadly i can’t place anything not templates, not custom, nor a singular block.
Is there anyway to fix this?