You might get this error “The address failed to save. Verify the address and try again.”
If you can see the exception.log displaying the Email Validation failed error, then you can solve this error by doing some PHP settings.
If You are a Plesk customer, then go to PHP settings, and then check the field “include_path” and you will see the value “.:/opt/Plesk/php/7.2/share/pear” replace this with “.”. and then press Apply button.
After performing the above steps, you should overcome the programming error.
See Attached Screenshot for reference