/onebox?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DM0ZmR6UU_8k&refresh=true https://www.youtube.com/watch?v=M0ZmR6UU_8k When you directly insert a YouTube URL into a post, onebox url will return a 404 error.

On my website, there seems to be an issue, but I’m not sure what’s causing it.

yeah. The same issue still persists.

is it only youtube? or do other oneboxes give the 404 error?

other oneboxes? can you give me some examples? thanks for you reply.

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All links are returning 404 errors. [image]

app/controllers/onebox_controller.rb 7a5a37ff8 category_id: category_id, topic_id: topic_id, ) preview = preview.strip if preview.present? Oneboxer.onebox_previewed!(user_id) if preview.blank? Oneboxer.cache_failed!(url) render body: nil, status: 404 else render plain: preview end end end end not good code. discourse(prod)> Oneboxer.onebox('https://www.youtube.com/watch?v=0506yDSgU7M') => " \n \n \n \n \n" discourse(prod)> Oneboxer.preview('https://www.youtube.com/watch?v=0506yDSgU7M') => " " I really don’t know the reason anymore.

Onebox url 404

Product Support

Lilly (Lillian ) July 24, 2025, 6:21am 4

have you tried safe mode?

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Onebox url 404

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