Hi Minesh, it has been already removed from everywhere but it is still showing up while submitting the content.. This error only occurs on the form submission page.
Can you please share problem URL where I can see the issue as well as admin access details.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin and FTP) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.