BPCSS2054E The device can't be added because older TLS protocols are disabled.
Explanation
This problem occurs when you attempt to add a device for monitoring that uses Transport Layer Security (TLS) 1.0 or 1.1 to communicate with data collectors. Because of known security vulnerabilities with TLS 1.0 and 1.1, TLS 1.2 is used (by default) to initiate communication between data collectors and your devices.
Action
For devices that don't support TLS 1.2, you can enable the data collector to initiate communication for the collection of metadata by using TLS 1.0 or 1.1. However, if you disable TLS 1.2 and use TLS 1.0 or 1.1, you might expose your organization to security risks. Instead of enabling TLS 1.0 or 1.1 with devices that don't support TLS 1.2, IBM strongly recommends that you contact your vendor to upgrade your devices to a version that supports TLS 1.2.
For more information about how to enable the collection of metadata for devices that use TLS 1.0 or 1.1, see https://www.ibm.com/docs/en/storage-insights?topic=didc-enabling-collection-metadata-devices-that-use-tls-10-11.