As per an old issue: https://www.virtualmin.com/node/14248
I have configured LDAP and it's all working. The problem is when I try to use Webmin's LDAP Users and Groups module. Even with the module fully setup, the LDAP Client and Server modules are showing up great, but the Users and Groups won't show up as "installed" unless I manually adjust the /etc/webmin/installed.cache and set ldap-useradmin=1.
What could be causing this to not be working as expected and always be removed from the installed list even though it's there, it's fully functional, etc?