Unattended Access: Linux (Debian Stable) host (with GDM3 GNOME GUI) + no monitor, won't display

Unattended Access: Linux (Debian Stable) host (with GDM3 GNOME GUI) + no monitor, won't display

As the subject says, I am running into an issue where the log files are saying that ZohoUA can't find a monitor (because there isn't one connected). I still need a virtual adapter of sorts so I can see the screen at a client's remote site.
Here is what the log files from /var/log/ZohoAssist/rds.log
  1. 2023/01/27 23:31:43 7f8d4315b3dd1dd6b9b39e4ebf7456e2 [[  Error occured in finding display Unable to find any display or xauthority]]
    2023/01/27 23:31:46 7f8d4315b3dd1dd6b9b39e4ebf7456e2 [[  Error occured in finding display Unable to find any display or xauthority]]
    2023/01/27 23:31:49 7f8d4315b3dd1dd6b9b39e4ebf7456e2 [[  Error occured in finding display Unable to find any display or xauthority]]
This results in just a gray screen when I try to connect to the GUI desktop, that looks as such


This is in a server room with very limited space and it's states away, so "just hook up a monitor" isn't going to cut it, sorry.

Please advise. I have already restarted the ZohoAssistUnattended service