When placing the ghosts of passing traffic lights, an error occurs and an exit is possible, and other ghosts cause an error, but I found only with passing traffic lights

Error while running event quick-adjustable-inserters::on_built_entity (ID 6)
quick-adjustable-inserters/runtime/cursor_direction.lua:54: attempt to perform arithmetic on local 'orientation' (a nil value)
stack traceback:
quick-adjustable-inserters/runtime/cursor_direction.lua:54: in function 'validate_orientation'
quick-adjustable-inserters/runtime/cursor_direction.lua:73: in function 'set_cursor_orientation'
quick-adjustable-inserters/runtime/cursor_direction.lua:184: in function 'handle_built_rail_connectable_or_offshore_pump'
quick-adjustable-inserters/control.lua:221: in function <quick-adjustable-inserters/control.lua:215>

Yea, known issue and I'm working on fixing it right now. I made a TODO for it and then forgot, basically the mod only handles 8 directions but there's 16 now. Fix should be out soon™.

Thanks for the report, should be fixed in 2.0.1.