I just started getting this error when attempting to approve emails...even if I don't edit the content of the email, I get this error. Anybody have any idea of what could be going on?
I've had this message persist sometimes and no one could figure it out. But I find selecting Validate Code from the Code Actions drop down does the trick.
Thank you! I already had </html> at the end of my email, but validating the code seemed to fix the problem!