How to debug issue when storing filedocument to S3?

I have deployed an app in Kubernetes and have file storage in S3. I now run into the issue that when trying to upload files larger than 1Mb I get an internal error. I have a hard time debugging the issue. StorageS3 does not show anything suggesting that the process does not get that far. Which other lognodes can I try? Of course, direct suggestions about what might cause the error are welcome as well. Max file size is set to 10Mb so that should not be the cause. On Mendix cloud it works. Locally it works.
1 answers

Have you tried log node "StorageS3"?