Hi Eric.
I know Virtualmin, I use Webmin and Usermin on some systems myself.
But we here have no idea about the installation via Webmin.
For good reason, the standard installation of EGroupware is designed differently:
For good reason, we install from Docker. More about this:
Why are you installing via Virtualmin?
Do you have the option of using a standard installation?
This can then also be supported…
Stefan