title: Package Name has not been set up correctly
body: <p>I am making a game on Unity following this tutorial on YouTube:</p>
  
  <p>I am brand new to Unity and Android Game Development, in the video I got to 35:16 and we are building the scenes and I clicked build and it is starting to load but when it gets to half-way done I get this error as seen in the image "Package Name has not been set up correctly</p>
  
  <p>Please set the Package Name in the Player Settings.
  The value must follow the convention
  'com.YourCompanyName.YourProductName' and can
  contain alphanumeric characters and underscore.
  Each segment must not start with a numeric character or underscore."</p>
  
  <p>Now, I am a 13 year old developer so I am quite young, I am not understanding what it is asking me to do and I don't know how to fix it, if a person could help me I would be so greatful... If needed we could go on Discord, Skype or Team Viewer to help me.</p>
  
  <p><a href="https://i.stack.imgur.com/C3FOX.png" rel="noreferrer"><img src="https://i.stack.imgur.com/C3FOX.png" alt="enter image description here"></a></p>