It is not possible to start Hardware Node Extension on Virtuozzo containers nodes after update to VZU600033 and later in VDI infrastructure with versions below 2.2.1. In HNE's log the following error is logged:
Signature check failed
Starting from update 33, only VDI versions 2.2.1 and later are supported.
Update VDI installation to the version 2.2.1 or a newer version.