/var/log/vrlcm/vmware-vrlcm.log on the Fleet Manager appliance
ERROR vrlcm[##] [http-nio-8080-exec-##] [c.v.v.l.l.c.EnvironmentController] – Exception while creating Environment : com.vmware.vrealize.lcm.lcops.common.exception.InvalidEnvironmentException: Deployment or Import Blocked: You’ve reached the limit of allowed instances for VCF Operations (maximum: 1). Please check your inventory and remove any existing deployed, failed or draft instance(s) to proceed with the new deployment or import.
Contact Broadcom technical support for further assistance.