I am getting below error. Can anyone please help me to resolve the below issue .

Getting in both AEM 6.4 and 6.5

org.apache.sling.servlets.get.impl.DefaultGetServlet No renderer for extension html, cannot render resource ResourceWrapper

Following the below link to register a form details into AEM  jcr:content.

Adobe Experience Manager Help | Persisting Adobe Experience Manager 6.4 JCR data using a Custom Form...