I switched from the old Primeface RichEditor to syncfusion WordEditor and used the class below to convert from html to sdft

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import com.syncfusion.docio.FormatType;
import com.syncfusion.docio.WordDocument;
import com.syncfusion.ej2.wordprocessor.WordProcessorHelper;

public class SFDTAdapter {
    
    public static String sfdtToRtf(String sfdt) throws Exception {
        return WordProcessorHelper.save(sfdt, com.syncfusion.ej2.wordprocessor.FormatType.Rtf).toString();
    }
    
    public static String rtfToSfdt(String rtf) throws Exception {
        byte[] bytes = rtf.getBytes(StandardCharsets.UTF_8);
        InputStream stream = new ByteArrayInputStream(bytes);
        WordDocument document = new WordDocument(stream, FormatType.Rtf);
        String sfdt =  WordProcessorHelper.load(document);
        document.close();
        stream.close();
        return sfdt;
    }
    
    
    public static String htmlToSfdt(String html) throws Exception {
        byte[] bytes = html.getBytes(StandardCharsets.UTF_8);
        InputStream stream = new ByteArrayInputStream(bytes);
        WordDocument document = new WordDocument(stream, FormatType.Html);
        String sfdt = WordProcessorHelper.load(document);
        document.close();
        stream.close();
        return sfdt;
    }
    
    public static String sfdtToHtml(String sfdt) throws Exception {
        return WordProcessorHelper.save(sfdt, com.syncfusion.ej2.wordprocessor.FormatType.Html).toString();
    }
}

However, when I deal with the old register, I get the following problem "Element type 'br' must be terminated by a matching closing tag". From what I've read, this is because DocIO validates that the content follows the xhtml 1 format. Is there a way to tell DocIO to ignore errors, or not validate the format?