The mod Kuxynator's Factorium (3.0.17) caused a non-recoverable error.
Please report this error to the mod author.
https://mods.factorio.com/mod/Kux-Factorium/discussion

Error while running event Kux-Factorium::on_gui_click(ID 1)
Kux-GuiLib/lib/ElementBuilder.lua:161: Value must be a string in property tree at ROOT.caption
→ while creating view "RecipeView".
at Kux-GuiLib/lib/ElementBuilder.lua:161: in function <Kux-GuiLib/lib/ElementBuilder.lua:126>

UI-Stack-Trace:
flow 'recipe_view'
table
flow
flow
label caption=table

Inner Error:
stack traceback:
[C]: in function 'add'
Kux-GuiLib/lib/ElementBuilder.lua:445: in function 'fnc'
Kux-GuiLib/lib/ElementBuilder.lua:261: in function 'create_multi'
Kux-GuiLib/lib/ElementBuilder.lua:466: in function 'fnc'
Kux-GuiLib/lib/ElementBuilder.lua:261: in function 'create_multi'
Kux-GuiLib/lib/ElementBuilder.lua:466: in function 'fnc'
Kux-GuiLib/lib/ElementBuilder.lua:261: in function 'create_multi'
Kux-GuiLib/lib/ElementBuilder.lua:466: in function 'fnc'
Kux-GuiLib/lib/ElementBuilder.lua:261: in function 'create_multi'
...
⇡× [C]: in function 'xpcall'
Kux-CoreLib/lib/Debug.lua:150: in function 'call'
Kux-GuiLib/lib/ElementBuilder.lua:161: in function <Kux-GuiLib/lib/ElementBuilder.lua:126>
(...tail calls...)
Kux-Factorium/ui/RecipeView-designer.lua:49: in function 'open'
> Kux-Factorium/ui/RecipeView.lua:112: in function 'navigate'
Kux-Factorium/ui/RecipeView.lua:116: in function <Kux-Factorium/ui/RecipeView.lua:116>
⇡× [C]: in function 'xpcall'
Kux-GuiLib/lib/GuiEventDistributor.lua:208: in function 'on_gui_event'
Kux-GuiLib/lib/GuiEventDistributor.lua:218: in function 'on_gui_click'
Kux-GuiLib/lib/GuiEventDistributor.lua:233: in function 'fnc'
Kux-CoreLib/lib/EventDistributor.lua:161: in function <Kux-CoreLib/lib/EventDistributor.lua:151>

2
stack traceback:
Kux-GuiLib/lib/GuiEventDistributor.lua:208: in function <Kux-GuiLib/lib/GuiEventDistributor.lua:208>
[C]: in function 'error'
Kux-CoreLib/lib/Debug.lua:154: in function 'call'
Kux-GuiLib/lib/ElementBuilder.lua:161: in function <Kux-GuiLib/lib/ElementBuilder.lua:126>
(...tail calls...)
Kux-Factorium/ui/RecipeView-designer.lua:49: in function 'open'
Kux-Factorium/ui/RecipeView.lua:112: in function 'navigate'
Kux-Factorium/ui/RecipeView.lua:116: in function <Kux-Factorium/ui/RecipeView.lua:116>
[C]: in function 'xpcall'
Kux-GuiLib/lib/GuiEventDistributor.lua:208: in function 'on_gui_event'
Kux-GuiLib/lib/GuiEventDistributor.lua:218: in function 'on_gui_click'
Kux-GuiLib/lib/GuiEventDistributor.lua:233: in function 'fnc'
Kux-CoreLib/lib/EventDistributor.lua:161: in function <Kux-CoreLib/lib/EventDistributor.lua:151>

which recipe are you trying to display?

No idea.

If you have no idea what you want to display, I certainly can't know which recipe is causing the problem.
when you have found out what you want to show, just contact me again.

If you think a recipe may be a problem, can you log the recipe before the call?
I'd run a debug mode if that is an option.

Unfortunately, I don't have an optional logging option for recipes, as you usually know what you have clicked on

I just got it looking for uses of stone

can you look at any recipe at all or is the problem with everyone?

cause found: recipes with an amount range
will be fixed in next release

excellent