This isn't really an API question, but this is the most accurate section I could find to post this issue. Anyone else have this problem? Any solutions? It shows up when I'm trying to download/view attachments as part of job posts. For example, Upwork's address redirects to https://agora-file-storage-prod.s3.amazonaws.com and shows the "<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated" blah blah blah. I can't see any attachments at all.
Could you please share with us what specific file you are trying to download from the Message Center where this error keeps showing up? Does this also show up even after clearing your cache and cookies, or using a different browser?