Web interface getting "Service Unavailable" message
http://localhost:3999/
returns "Service Unavailable" message.

What do I need to check in my Network Setting to make sure localhost is not locked out for some reason?
Even http://localhost:3999/config doesn't work

It is reaching something because the message is different when MPM not running.

Well trying to delete anything with MPM in Windows Firewall, maybe a better way not to have millions of entries?