Just a polite bump, hopefully someone else is using VOA and has run into this issue. I reached out to VMware support but have received no response.
I dont use voa but the only thing i know is you need to be a partner and have access to the partner central portal to be able to download the pak file that contains the reports.
The trial ISO should have the VOA reports built in as far as I remember.
Do you get anything back when you search the reports page for "VOA" ?