One of the OVF's elements is invalid.com.vmware.vcloud.api.presentation.service.BadRequestException: One of the OVF's elements is invalid. at com.vmware.ssdc.backend.services.impl.VAppUploadManagerImpl.createNetworkConnectionSectionForUpload(VAppUploadManagerImpl.java:4869)...VMware Cloud Director 10.6.x
VMware Cloud Director is unable to properly process the networking for the vApp upon upload.
In order to work around this behavior, deploy the Umbrella VA using the underlying vCenter deployment and import the resulting item into VMware Cloud Director.