I would like to know how I can change the default text which appears above the fields when a required field is not filled in.
There is not an inbuilt option for changing the “default error message” in Divi theme for contact form but you can achieve this by making certain changes in framework.php file. Follow the steps:
Please open \wp-content\themes\divi\includes\builder\framework.php file.
Search the following code below in the framework.php file and make the changes accordingly.
‘fill_message’ => esc_html__( ‘Please, fill in the following fields:’, ‘et_builder’ ),