>>2895Nikto is out of date.
Browse to the site hosted on 80. Open the dev console (or inspect element). Peruse the sources, watch the different transfers in the Network tab.
Once you get a feel for how the site works, start playing with request variables. What happens if this equals zero? What happens if I submit this JSON payload without authentication?
Unless you are participating in a CTF, immediately stop using scripts and tools (short of dirsearch). Bad news friend: hacking sites require you to learn the sites manually.