When writing in topics in our Discourse site, when pasting some links, Discourse cannot retrieve OpenGraph (OneBox) information. We get an error like this (see also in screenshot): >Sorry, we were unable to generate a preview for this web page, because the following oEmbed / OpenGraph tags could no…

[immagine] wlandgraf: When writing in topics in our Discourse site, when pasting some links, Discourse cannot retrieve OpenGraph (OneBox) information. We get an error like this (see also in screenshot): Hi there - i tested that particular link you posted and it oneboxes as expected. clearly t…

@Lilly thank you for your response. I have version `2026.01.0-latest`. I can update to `2026.2.0` of course, but my version is not that old. Yes, all other oneboxes work in my forum. Just that ones don’t work. About my onebox settings, they are all default. If I click “Only show overriden” nothing…

Ok, I found the problem, it looks like Discourse server doesn’t have the recent certificate chain used by the server.

Perché Discourse non riesce a recuperare i dati OpenGraph?

Supporto

wlandgraf (Wagner Landgraf) 11 Marzo 2026, 2:27pm 4

Ok, ho trovato il problema, sembra che il server Discourse non abbia la catena di certificati recente utilizzata dal server.

Argomento		Risposte	Visualizzazioni
Link preview not working for specific site Support	11	2368	Gennaio 12, 2020
Onebox error but OG tag present Support	2	518	Gennaio 3, 2021
Website Links pasted into a Topic Feature	5	1171	Settembre 18, 2021
Why Do Some Blog Posts in Discourse Have A Preview? Support	9	2278	Luglio 3, 2023
Link-image not shown Self-hosting unsupported-install	17	489	Giugno 17, 2024

Perché Discourse non riesce a recuperare i dati OpenGraph?

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