Engine Error - attempt to index local entity (a nil value)

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1

Summary:
Error encountered while creating a custom building.

Steps to reproduce:

release-693 (x64)
radiant/modules/entities.lua:308: attempt to index local ‘entity’ (a nil value)
stack traceback:
[C]: ?
radiant/modules/entities.lua:308: in function 'get_world_grid_location’
stonehearth/services/server/build/build_service.lua:581: in function '_subtract_region_from_floor’
stonehearth/services/server/build/build_service.lua:309: in function '_add_floor_type’
stonehearth/services/server/build/build_service.lua:259: in function 'add_floor’
stonehearth/services/server/build/build_service.lua:143: in function 'cb’
stonehearth/services/server/build/build_service.lua:1582: in function 'do_command’
stonehearth/services/server/build/build_service.lua:142: in function <stonehearth/services/server/build/build_service.lua:140>

Version Number and Mods in use:
Alpha 20 Release-693 (x64)

System Information:
Windows 10

2

Opps…there was a second error I forgot to upload.

release-693 (x64)
c++ exception: lua runtime error
stack traceback: