Credentials error when adding a VMware Host to CloudForms 2.0

Issue

When adding a new VMware host as per the [documentation], got the error

[----] I, [XXX]  INFO -- : Followed  Relationship [miqaedb:/System/Event/ems_auth_error#create]
[----] I, [XXX]  INFO -- : MiqAeEvent.build_evm_event >> event=<"ems_auth_error"> inputs=<{:type=>"EmsVmware"}>
[----] I, [XXX]  INFO -- : Instantiating [/System/Process/Event?ExtManagementSystem::ext_management_system=13&MiqServer::miq_server=1&event_type=ems_auth_error&object_name=Event&type=EmsVmware&vmdb_object_type=ext_management_system]
[----] I, [XXX]  INFO -- : Following Relationship [miqaedb:/System/Event/ems_auth_error#create]
[----] I, [XXX]  INFO -- : Instance [/System/Event/ems_auth_error] not found in MiqAeDatastore - trying [.missing]
[----] I, [XXX]  INFO -- : Followed  Relationship [miqaedb:/System/Event/ems_auth_error#create]