Symptoms:
null - https://<vCenter FQDN>/sdk/vimService invocation failed with "com.vmware.vim.vmomi.core.exception.MarshallException: Required argument not passed: spec" - Required argument not passed: spec
Caused by: com.vmware.vim.vmomi.client.exception.VmomiProtocolException: https://<vCenter FQDN>/sdk/vimService invocation failed with "com.vmware.vim.vmomi.core.exception.MarshallException: Required argument not passed: spec"
This issue can be seen during failover processes with third party products like Zerto Disaster Recovery.
The issue is resolved in VMware Cloud Director 10.3.3.2, available at Broadcom Downloads.