Thank you for the help.I found out the issue.Explanation:I was creating
an email delivery using some fragments and i was getting error in the
preview,creating thumbnail and publishing.When any email delivery is
created using fragments/templates the ID of the fragment/templates is
used in the html of the email.Fragments in my dev instance were renamed
and when i was trying to preview email, template had old naming
convention and at time of preview/publish new names were referred.So
there was a co...