When opening or destroying a Combinator created through blueprints, the game crashes:
opening:
The mod Sandboxed LuaCombinator (0.4.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event SandboxedLuaCombinator::on_gui_opened (ID 84)
SandboxedLuaCombinator/script/gui.lua:90: attempt to index field '?' (a nil value)
stack traceback:
SandboxedLuaCombinator/script/gui.lua:90: in function 'create_gui'
SandboxedLuaCombinator/script/gui.lua:20: in function 'open'
SandboxedLuaCombinator/control.lua:977: in function <SandboxedLuaCombinator/control.lua:969>
crashes:
The mod Sandboxed LuaCombinator (0.4.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event SandboxedLuaCombinator::on_pre_player_mined_item (ID 11)
SandboxedLuaCombinator/control.lua:311: attempt to index local 'tbl' (a nil value)
stack traceback:
SandboxedLuaCombinator/control.lua:311: in function 'on_combinator_destroyed'
SandboxedLuaCombinator/control.lua:339: in function <SandboxedLuaCombinator/control.lua:334>