I know this is 1.1.x, just keeping you informed

Error while running event Smart_Inserters::on_gui_click (ID 1)
__Smart_Inserters__/control.lua:548: attempt to index local 'inserter' (a nil value)
stack traceback:
    __Smart_Inserters__/control.lua:548: in function 'get_inserter_orientation'
    __Smart_Inserters__/control.lua:1222: in function 'on_button_position'
    __Smart_Inserters__/control.lua:1689: in function <__Smart_Inserters__/control.lua:1684>

Update

Crashed again, but on 1.2.7 for this time

Error while running event Smart_Inserters::on_gui_click (ID 1)
__Smart_Inserters__/scripts/inserter_functions.lua:320: attempt to index local 'inserter' (a nil value)
stack traceback:
    __Smart_Inserters__/scripts/inserter_functions.lua:320: in function 'get_inserter_orientation'
    __Smart_Inserters__/scripts/selector_gui.lua:423: in function 'on_button_position'
    __Smart_Inserters__/control.lua:225: in function <__Smart_Inserters__/control.lua:217>

Can you you tell me what you di to male this errore appear (the steps to reproduce It)

Can you you tell me what you di to male this errore appear (the steps to reproduce It)

No steps to reproduce. I just opened the GUI of an inserter.
There only thing common for both cases is the fact there was a train / ship nearby.

Can you send me the save and a screenshot of your settings?

I can't reproduce the issue

Map exchange string:

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xlbOj1zUGhP426z+8j+kTfUSggwKhTxaUn9OhS6XeCJtetvem/QVZuL
+z8B7fTxgU=<<<

Save (between two crashes):
https://disk.yandex.ru/d/jC-rkjU35kr_TQ

Settings:

• Max range: 4
• Max range type: Incremental
• Offset selector: true
• Technology upgrades: all
• Technology difficulty: Hard
• Disable long inserters: false

I downloaded the save, changed the settings

opened an already placed inserter
placed a new inserter and opened it

Both were near a ship, I tried 1.2.7 and could not reproduce the crush.
I tried in another world with yout mods and settings and everything worked just fine.

I did some changes in 1.2.8 that could fix the bug, if the issue persist or is fixed tell me.

Well, the crashes were occasionally.

Ill keep looking in the edge case that make this happen, if you think you found a solid way to reproduce the crash tell me.