by: org.xml.sax.SAXException: Fatal error parsing null (line 75 col. 249): Element or attribute do not match QName production: QName::=(NCName':')?NCName.
org.xml.sax.SAXParseException; lineNumber: 75; columnNumber: 249; Element or attribute do not match QName production: QName::=(NCName':')?NCName.
    at org.apache.excalibur.xml.impl.JaxpParser.fatalError(JaxpParser.java:463)
    at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
    at org.apache.xerces.impl.XMLEntityScanner.scanQName(Unknown Source)
    at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanAttribute(Unknown Source)
    at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:315)
    at org.apache.excalibur.xml.impl.JaxpParser.parse(JaxpParser.java:334)
    at org.ametys.cms.transformation.XhtmlGenerator.generate(XhtmlGenerator.java:60)
    at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:581)
    ... 128 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 75; columnNumber: 249; Element or attribute do not match QName production: QName::=(NCName':')?NCName.
    at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    ... 146 more