WP Forms does not save changes in form

Hello i am using wp-forms for a long time before this site which i have given above i also used the wp-forms on another site of mine and it is working fine there but at this is wordpress site which i have given above the forms is not saving any changes i have done troubleshooting regarding the plugin or theme i have done all kinds of troubleshooting but it just not saving any changes kindly please help me out.

The page I need help with: [log in to see the link]