Hey there,
I'm trying to set up S3 for Mattermost and after I stumbled over the issue that the region Frankfurt is not supported I tried again with us-east-1.
Now, authentication seems to basically work, but when I try to upload, for example, a new profile image, the upload fails and I see this error in my log:
[2016/05/18 08:42:42 UTC] [EROR] /api/v3/users/811hfkq8ntyd5r8wgrfwkxi3qh/image:WriteFile code=500 rid=edbd9ym9ktyn8eq9sf6jsnnf1o uid=811hfkq8ntyd5r8wgrfwkxi3qh ip=10.96.0.1 Encountered an error writing to S3 [details: The request signature we calculated does not match the signature you provided. Check your key and signing method.]Anyone had that problem or knows how to debug / solve it?