eDocument Mexico : Cancellation of Old document after CFDI 4.0 Implementation

Hi Experts

We have deployed all related notes regarding CFDI 4.0 but after deployment we were not able to Cancel old edocument generated using CFDI 3.3 version and getting below error

XML could not be processed;node not foundComprobante/Comprobante/Emisor

Please advise if anybody has faced simillar issue .