Error : "An error occurred" after validating the import settings

After validating the import settings, you may see the below error: an XML File contains an error

An error occurred. You must resolve this issue before starting the import process.
Technical information : <file path containing an error, including line number>.

This issue is caused by at least one faulty XML file, containing an error. Please, refer to the line displayed in the error window and correct the XML file before continuing the import process.