Before starting a new game I deleted a mod and added others, and it seems that when I open Factorium it is looking for the previously deleted mod (maybe it was in the search history). This is a scenario that you may not have thought of and I am happy to have helped you find this bug.
Thanks for the changes and fixes to the mod

Thanks for reporting it. but i would need more details. resp. an error message to see where exactly the error occurred.

Sorry I forgot

Error while running event Kux-Factorium::on_lua_shortcut (ID 40)
Unknown item name: sspp-stop
stack traceback:
[C]: in function 'add'
Kux-CoreLib/lib/gui/ElementBuilder.lua:267: in function 'fnc'
Kux-CoreLib/lib/gui/ElementBuilder.lua:129: in function 'create_multi'
Kux-CoreLib/lib/gui/ElementBuilder.lua:284: in function 'fnc'
Kux-CoreLib/lib/gui/ElementBuilder.lua:129: in function 'create_multi'
Kux-CoreLib/lib/gui/ElementBuilder.lua:284: in function 'fnc'
Kux-CoreLib/lib/gui/ElementBuilder.lua:95: in function <Kux-CoreLib/lib/gui/ElementBuilder.lua:80>
(...tail calls...)
Kux-Factorium/ui/SearchView-designer.lua:26: in function 'open'
Kux-Factorium/ui/SearchView.lua:28: in function 'open_subview'
Kux-Factorium/ui/MainView.lua:67: in function 'open'
Kux-Factorium/control.lua:101: in function 'on_lua_shortcut'
Kux-Factorium/control.lua:132: in function 'fnc'
Kux-CoreLib/lib/EventDistributor.lua:167: in function <Kux-CoreLib/lib/EventDistributor.lua:160>