Cannot add an ESXi host in SDDC (Software Defined Data Center) Manager after it has been added to a VxRail cluster

Products

• VMware SDDC Manager

Issue/Introduction

1. Cannot add the ESXi host due to the error: "Failed to validate hosts in given spec with errors [HOST_VERSION_NOT_COMPATIBLE......"

2. The following error is observed in /var/log/vmware/vcf/lcm/lcm-debug.log: 

Error loading the vrm logical inventory
java.lang.NullPointerException: Cannot invoke "com.vmware.vcf.inventory.rest.model.Vcenter$DomainType.toString()" because the return value of "com.vmware.vcf.inventory.rest.model.Vcenter.getDomainType()" is null

Environment

VCF on VxRail 5.2.0 and 5.2.1

Resolution

Please contact Broadcom Support for assistance and reference Knowledge Base article 406662.