Summary: An error message pops up when loading the attached savegame. Windows won’t be put into place despite having lots and lots of undeployed ones in store.
Steps to reproduce:
- Load game
- Get an error message
Expected Results: No error and placed windows.
Actual Results: Error and no placed windows. 
Notes:
develop-2881 (x64)…onehearth/components/building/building_component.lua:313: attempt to index local ‘entity’ (a nil value)stack traceback:
radiant/modules/common.lua:223: in function 'report_traceback’
radiant/modules/common.lua:234: in function <radiant/modules/common.lua:228>
…onehearth/components/building/building_component.lua:313: in function ‘_trace_entity’
…onehearth/components/building/building_component.lua:123: in function ‘_restore_structure_traces’
…onehearth/components/building/building_component.lua:77: in function 'obj’
radiant/modules/events.lua:73: in function 'instance’
radiant/modules/events.lua:206: in function <radiant/modules/events.lua:200>
[C]: in function 'xpcall’
radiant/modules/common.lua:243: in function 'xpcall’
radiant/modules/events.lua:200: in function <radiant/modules/events.lua:171>
Attachments: Here’s the save.
Version Number and Mods in use: 2881, no mods
System Information: Core i5 3470, GTX 970, 8 GB RAM, Win 10 64 Bit