Re-writing this topic since the issue is worse than I believe first.
Oneboxing doesn’t work anymore on my forum unicyclist.com and I don’t know why.
I got 404 errors like
GET https://unicyclist.com/onebox?url=https%3A%2F%2Fmeta.discourse.org%2F&refresh=false&category_id=2&topic_id=272954 404
I’ve also a bunch of warnings: could it be related in any way?
My onebox settings:
My installed plugins:
Using safe-mode didn’t resolve the issue.
I’m on 2.9.0.beta1 and did a rebuild.