After Magento upgrade to its latest version, no success and error messages are seen to be added on the page message section while submitting the newsletter.
But the email gets saved on to the backend
It shows message when reverted to luma but doesn't work on custom theme. It was working fine before the update.
Can anyone suggest what might have caused the issue after update.
Best Answer
For me this issue was being caused by the message block not being present on the page. Try loading other pages that you have modified less.