Case: https://access.redhat.com/support/cases/#/case/03326867

The customer is trying to add an aws source without success. The key factor in this story is that it only happens when using an S3 bucket located in the Cape Town region (AF-south-1), so as a workaround, the customer is using an S3 bucket located in the EU

Andrew Berglund pointed to this thread although it is an old issue, so it is worth checking: https://repost.aws/questions/QUIZTCFPrzQXa2WJ2VaPC2lw 

On the other side, if there is something else we can check, please let me know without hesitation. I'll keep this cluster running for testing/reproducer purposes.