I've encountered a similar problem on Huawei's OBS, and my solution was to configure the domain with a corresponding SSL certificate to ensure that he could access https content. And, I noticed that there seems to be a corresponding depiction in the official netapp documentation?

Client communications with the Load Balancer service use HTTPS if HTTPS is configured for the load balancer endpoint.

When you configure a load balancer endpoint, HTTP can optionally be enabled. For example, you might want to use HTTP for testing or other non-production purposes. See the instructions for administering StorageGRID for more information.

By default, StorageGRID uses HTTPS for client communications with Storage Nodes and the CLB service on Gateway Nodes.

HTTP can optionally be enabled for these connections. For example, you might want to use HTTP for testing or other non-production purposes. See the instructions for administering StorageGRID for more information.