With Webmin 1.760 and 1.770, we were running into a situation where we had to keep running the setup install script from Terminal, as Webmin seemed as though it was not installed.
From Terminal, we ran:
and then it was fine. But after a restart, we ran into the same issue where the Webmin page said it could not find http://[pc-name].local:10000/.
Turns out the issue was our LaunchDaemon.
In ~/Library/LaunchDaemons/com.webmin.webmin.plist, here’s what fixed it:
<?xml version=”1.0″ encoding=”UTF-8″?>
<!DOCTYPE plist PUBLIC “-//Apple//DTD PLIST 1.0//EN” “http://www.apple.com/DTDs/PropertyList-1.0.dtd”>
After a restart, Webmin was back to normal.