On the SDDC Manager UI - Password Management page, the VRLCM root account is disconnected.
VCF 5.x
The VRLCM root account may have gone into a disconnected state for a variety of reasons.
Remediate the root account of the SDDC Manager UI - Password Management page for the VRLCM root account using this documentation as a guide -
https://techdocs.broadcom.com/us/en/vmware-cis/vcf/vcf-5-2-and-earlier/5-2/remediate-passwords.html