Lists within lists: What is wrong with this code?

Every time that I use the following code, I get this error message

George Parks

Hello, my name is George Parks. I am a 10 year old computer programmer, YouTuber, and more!

Interests

  • Programming
  • Gaming
  • Golf
  • Tennis
  • Basketball
  • Math

Games I play

  • Minecraft
    • I play a lot on Mineplex
    • PixelClan
    • Hypixel
    • and The Hive
    • My IGN is SheepGalaxy
    </li>
    <li>Team Fortress 2</li>
    <li>Garry's Mod</li>
    </ul>
    <h3> Groups/servers/websites/communities that I manage </h3>
    <li>PixelCraft, my Minecraft server (IP: PixelMC.noip.me)</li>
    <li>PixelClan, my community site (PixelClan.gq, currently down...)
    <ol>
    <li> It may not ever come online again, though...</li>
    </ol>
    </li>
    </ul>
    <h3> Social Media </h3>
    <ul>
    <li>Twitter (@SheepGalaxy)</li>
    <li>Facebook (<a href="https://www.facebook.com/george.parks.92167">Here</a>)</li>
    <li>Instagram (sheepgalaxy)</li>
    </body>
    

The code can also be found here

You might want to reset the lesson and start it again… Make sure to have an opening and closing tag for each element

as zainabrawat said your missing lots of opening and closings
<li>PixelClan, my community site (PixelClan.gq, currently down...) is an example of a missimg closing tag <li>PixelClan, my community site (PixelClan.gq, currently down...)</li>
would be correct.

also please format correctly and post correctly. When you paste code press the </> button