@bonekarusia The good news is, you’re on the right track! 🙌🏾
The error thrown by xmllint does not say exactly why the document is currently broken. Instead, it gives you a hint regarding where to start looking for the actual issue.
As a next step here, we recommend opening the .XML file in a text editor like https://www.sublimetext.com/ and checking to see if you can find the missing tag manually!