in Java HV000030: No validator could be found for constraint ‘javax.validation.constraints.Email’

I am trying to send html email notification when user submits a form but I am getting an error. Can you please look at it? There was an unexpected error (type=Internal Server Error, status=500)….

To read String text content after Converting HTMl to text in java

I am having HTMl Form in email body, how can i read string text content after converting HTML FORM into text. Can Anyone please help me? Email Body – HTML Form: Email Body – HTML Form Content: <...