org.xml.sax.SAXParseException; lineNumber: 659; columnNumber: 5; The element type "p" must be terminated by the matching end-tag "".
The asset has the extension 'xml or dfxp' but is not a valid TTML file. There is an issue with the structure of the XML. The error message will provide the line number, and the element within that line, that is causing the issue.
Review the error message. As TTML is human-readable, open it within a text editor and review the line in question. This issue is usually encountered when an element or tag is not closed correctly. Likely due to a manual edit that was carried out incorrectly.
Either manually correct the issue or regenerate the file from your subtitling software.