Grey screen on some product, on some knowledge panels

[teolemon]

What

• Documentation in progress…

Steps to reproduce the behavior

1. Go to 3256540000698
2. Click on the knowledge panels related to ingredient analysis
3. See error

Screenshots

[monsieurtanuki]

As far as I understand KP, it looks like the data we get from the server is slightly corrupted.
In particular, for vegan and vegetarian, the elements refer to a panel that does not exists in the rest of the JSON ("ingredients_analysis_help"). And that's the reason of the crash: a null panel where we expect one.

Is there something we're missing in Smoothie's parameters that prevents us from getting the "ingredients_analysis_help" panel? I don't know.
Anyway, we could play it robust and take into consideration the possibility of a null panel without crashing.
About to PR...

"ingredients_analysis_en:non-vegan": {
	"elements": [{
		"element_type": "text",
		"text_element": {
			"html": "\n                \n                    <strong>Ingrédients non végétaliens :</strong>\n                    Œuf frais, Matière grasse butyrique, Lait en poudre écrémé, Protéine de lait\n                \n                    ",
			"type": "summary"
		}
	}, {
		"element_type": "panel",
		"panel_element": {
			"panel_id": "ingredients_analysis_help"
		}
	}],
	"evaluation": "bad",
	"level": "info",
	"size": "small",
	"title_element": {
		"icon_color_from_evaluation": true,
		"icon_size": "small",
		"icon_url": "https://static.openfoodfacts.org/images/icons/dist/leaf.svg",
		"title": "Non végétalien"
	},
	"topics": ["health"]
},
"ingredients_analysis_en:vegetarian-status-unknown": {
	"elements": [{
		"element_type": "text",
		"text_element": {
			"html": "\n                \n                    <strong>Ingrédients non reconnus :</strong>\n                    Levain\n                \n                    ",
			"type": "summary"
		}
	}, {
		"element_type": "panel",
		"panel_element": {
			"panel_id": "ingredients_analysis_help"
		}
	}],
	"evaluation": "unknown",
	"level": "info",
	"size": "small",
	"title_element": {
		"icon_color_from_evaluation": true,
		"icon_size": "small",
		"icon_url": "https://static.openfoodfacts.org/images/icons/dist/vegetarian.svg",
		"title": "Caractère végétarien inconnu"
	},
	"topics": ["health"]
},