Be more pedagogical about Ingredients nutrition game broken when Robotoff is 502

[teolemon]

Story

• Ingredients, nutrition game broken when Robotoff is 502: https://robotoff.openfoodfacts.org/api/v1/insights?count=100&page=1&lc=en&insight_types=ingredient_detection&annotated=false
• https://hunger.openfoodfacts.org/ingredient-detection
• Error: SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

Part of

[vidishadeswal]

Hi! I've fixed this issue locally — may I be assigned so I can create a PR?

[alexfauquette]

We don't work a lot with issue assignement. If it's working locally, you can open a PR linked to this issue with keywords like Fix #<Issue number>