AAM to S3 bucket: AWS Error 0 while requesting to upload the query

Hi all, this is my first time trying to upload a file to an S3 bucket for Campaign to AAM integration.

I had a 403 error because my file was not correctly formatted, then I've followed the guide:

https://docs.adobe.com/content/help/en/audience-manager/user-guide/implementation-integration-guides/sending-audience-data/batch-data-transfer-process/inbound-ftp-filenames.html

And now I got a "0" error, that is not documented into AWS error codes -> AWS Error 0 while requesting to upload the query.

Thansk for your help.

GDD.