Hey Chesio,
Thanks so much for the speedy response, you’re awesome! Yes, it’s definitely related to the style constructor, however when you go to set up a new automated newsletter, you can’t see the content anymore in the Newsletter Template, which means you can’t style the email content. When I send a test email, it gives me some other error messages, but it does send the email, with automated content, I just can’t actually set up any formatting of the content, when setting up the newsletter.
Obviously they’re rebuilding MailPoet for v3, but anyone who updates to WP 4.3 won’t be able to use Mailpoet to set up new automated emails very easily.
Thanks,
James