Screenshot: https://disk.yandex.ru/i/mYwObLV_G7ausA
Savefile: https://disk.yandex.ru/d/rZ07EJwq3UGAPA (autosave happened to occur in between of these messages)

Thanks for the report. I have some idea where the bug is coming from but when I load the save, I think the configuration change code cleans up the problem and the error stops. It seems there are two mod versions that are not on the mod portal, "RadarMarker 1.2.0" and "Kux-OrbitallonCannon 2.5.0". Can you send me those files as well so I can load the save without the cleanup occurring?

Thanks for the report. I have some idea where the bug is coming from but when I load the save, I think the configuration change code cleans up the problem and the error stops. It seems there are two mod versions that are not on the mod portal, "RadarMarker 1.2.0" and "Kux-OrbitallonCannon 2.5.0". Can you send me those files as well so I can load the save without the cleanup occurring?

Sure.
BTW, they are basically the same as the last published versions with minor local tweaks.
Both are not prod-ready so not published them. :D

https://disk.yandex.ru/d/H-ZWpCWSj7rbvA

Thanks for sharing. For some reason it still runs on_configuration_change and the message stops. (I downloaded 1.1.109 and everything.) I'll post an update fixing what I think is the problem and let me know if it happens again!