localhost:3333doesn'topen

Dear,
I am new on github and new on Linux, I downloaded goPhish since I need a tool to deploy a phishing attack on my department in college with the approval of our professors because we're planning to do some statistics about how many will visit the link, and how many will provide us with their emails, no password shall be taken. However, after I downloaded gohish when I go to localhost:3333 all it opens is this