Bug after loading

Summary: I load the the savegame and it appears

Steps to reproduce: load savegame

Expected Results:

Actual Results: It seems workers like carpenter dont work anymore

Notes:

Attachments:

Version Number and Mods in use: 838

System Information:

release-838 (x64)
…components/building2/plan/nodes/new_fixture_node.lua:45: attempt to index local ‘ghost’ (a nil value)
stack traceback:
[C]: ?
…components/building2/plan/nodes/new_fixture_node.lua:45: in function ‘restore’
stonehearth/components/building2/plan/plan.lua:31: in function <stonehearth/components/building2/plan/plan.lua:18>

release-838 (x64)
c++ exception: lua runtime error
stack traceback:

release-838 (x64)
radiant/modules/entities.lua:369: attempt to index local ‘entity’ (a nil value)
stack traceback:
radiant/modules/commons.lua:53: in function ‘report_traceback’
radiant/modules/commons.lua:64: in function <radiant/modules/commons.lua:58>
radiant/modules/entities.lua:369: in function ‘get_world_grid_location’
…components/building2/plan/nodes/new_fixture_node.lua:131: in function ‘get_working_regions’
…tonehearth/components/building2/building_monitor.lua:183: in function ‘_on_building_progress_slow’
…tonehearth/components/building2/building_monitor.lua:172: in function ‘fn’
radiant/controllers/nonpersistent_timer.lua:56: in function ‘fire’
radiant/controllers/time_tracker_controller.lua:86: in function <radiant/controllers/time_tracker_controller.lua:86>
[C]: in function ‘xpcall’
radiant/modules/commons.lua:73: in function ‘xpcall’
radiant/controllers/time_tracker_controller.lua:86: in function ‘set_now’
radiant/controllers/time_tracker_controller.lua:126: in function ‘increment_now’
radiant/modules/timer.lua:13: in function ‘instance’
radiant/modules/events.lua:295: in function <radiant/modules/events.lua:289>
[C]: in function ‘xpcall’
radiant/modules/commons.lua:73: in function ‘xpcall’
radiant/modules/events.lua:289: in function ‘trigger’
radiant/modules/events.lua:409: in function ‘_trigger_gameloop’
radiant/modules/events.lua:457: in function ‘_update’
radiant/server.lua:66: in function <radiant/server.lua:63>