sachinsehdev It looks like the image field is required in style-1, could you add this field first?
If you don't use this field, open the file: /templates/ja_nova/acm/features-intro/tmpl/style-1.xml
and remove this line of code - line 43:
<item name="intro" type="media" default="" label="FEATURES_INTRO_IMAGES_LABEL" description="FEATURES_INTRO_IMAGES_DESC"/>