Explanation: One reason for a "page not found" message is that the Foxhound database didn't start properly, and the most common reason for that is some other process is already using HTTP port 80 so Foxhound couldn't start.

Another reason is that Foxhound is using some port other than 80 for HTTP and you forgot to code that port in the URL. For example, if you started Foxhound on port 12345, then you need to use this URL:

http://localhost:12345

See also...
Can't start HTTP listener on address 127.0.0.1:80
How do I tell Foxhound to use an HTTP port other than 80?