Looks to be an issue with the Perl module OntapClusterAPI.pm in the NMSDK version 5.7 (included with WFA 4.1).
security_config_get calls fail with the following error:
07:46:32.669 ERROR [sec_config_get_test] Failed executing command. Exception: No definition for typedef security-supported-protocols found at /opt/netapp/wfa/perl/nmsdk/OntapClusterAPI.pm line 101222, <STDIN> line 1.
OnCommand Unified Manager 7.1
Cannot roll back to WFA 4.0 as certain features in WFA 4.1 are required for this implementation