It was breaking in Firefox. This fix does not affect end result - error message is correct.
@@ -113,7 +113,7 @@ export default class XmlDataProcessor {
const parserError = document.querySelector( 'parsererror' );
if ( parserError ) {
- throw new Error( 'Parse error - ' + parserError.querySelector( 'div' ).textContent );
+ throw new Error( 'Parse error - ' + parserError.textContent );
}
const fragment = document.createDocumentFragment();