After an in-place Debian upgrade, Virtualmin and Webmin were inoperative. I was not the tech that implemented the upgrade but was the recipient that the management software was inop so I needed to clean up the mess. I reinstalled Webmin (I think bad for retaining the Virtualmin meta data). The /virtual-server/domains folder within /etc/webmin does not exist -- I am assuming this was overwritten with the new Webmin install. However, the websites within /home still exist and function -- with caveats. MySQL was broken on one site, a Word Press site only displayed a blank white landing page and had many PHP errors (version differences) when trying to move to a new server. I eventually restored this site to a different server and all was good.
My question: Is there a way to install Virtualmin back on the machine and integrate the sites back in or is this a lost cause. The server is due for retirement anyway.