When attempting to deploy the SMG OVA via VSphere, VSphere returns the following error:
The OVF package is invalid and cannot be deployed.
The following manifest file entry (line 1) is invalid: SHA256 (smg.ovf).
This is a known issue with some versions of VSphere including VSphere 6.0 which do not support the SHA256 hash that is used for the OVF/OVA signature. This is documented in the VMWare KB https://kb.vmware.com/s/article/2151537.
This issue may be resolved by converting the SMG OVA from a SHA256 signature hash to a SHA1 signature hash as described in the VMware KB article: