/storage/log/vcops/log/web-vcf.log in VCF operations shows:
versionCheck API request was unsuccessful for ops-lcm, code: 403.
Remediate for appliance <fleetmanagerfqdn> has failed
GET https://<VCFOpsFQDN>/vcf-operations/plug/ops-lcm/lcm/bootstrap/api/status 403 (Forbidden)
VCF 9.0.x
One of the VCF Operations cluster nodes root password was changed by command line which is not recommended.
As a result VCF Operations is out of sync with Fleet Management.
For more information on managing passwords in VCF 9.0 please refer to document Managing Passwords for VMware Cloud Foundation Components