So I spent the time learning the details of Amazon S3, Cloudfront and so on. I am happy to report it uploads great!
But still totally unable to upload any PDF. I can’t quite see how this could be S3 related given that other files work fine - but I may be wrong.
No matter what size I set for file uploads and no matter what size a PDF is, I can’t upload them. I always get:
Sorry, that file is too big (maximum size is 40 MB). Why not upload your large file to a cloud sharing service, then paste the link?
I followed the instructions for how to increase file upload size but no size PDF will upload, includng sizes well below the limit. I am on the absolutely most update commit set of Discourse.