Snap! A lightsail instance running centos (converted to rocky) and virtualmin is how I'm hosting my CMSMS sites, but due to the security concerns of running Php 7 past EOL they're on their own instance.

These days I use Hugo for sites that don't require an admin interface, and either Grav or Bolt for sites that the customer needs to edit themselves.

CMSMS was the first CMS I ever used. It was great 10-15+ years ago, but it's so clunky compared to modern frameworks that I really dislike working with it. Even something as simple as abstracting a template to use with git means jumping through hoops and hoping someone doesn't click the wrong button in the admin panel.

Recently the Less/Sass plugin broke after a system update and it needed coaxing back to life. It reminded me how much I take for granted with other frameworks, and highlighted some of the missing functionality in CMSMS. For this and other reasons I'd encourage anyone who finds themselves in a similar position to migrate where feasible and to absolutely avoid using it for a new project.

Best of luck maintaining your cobwebsite!