Back up from TrueNAS to MinIO S3 Target

As part of my backup strategy, I would like to back up to a MinIO instance on a separate TrueNAS Scale system (I currently have snapshots replicating to a third system offsite). However, I am having trouble configuring the cloud credentials. Has anyone had any success setting this up?

Both systems are running TrueNAS Scale 24.04.0 and I have MinIO installed through the main app repository. I have set up a bucket and created a user with access privileges to that bucket. When setting up the cloud credentials, I am entering the Access Key ID and Secret Access Key of the new user and enter the secondary TrueNAS IP address of the Endpoint URL. I have even tried the root user login info entered when the app was first created. None of this has worked for me. Appreciate any help on this.

Thank you!