Thank you for reaching out to the Community! I'm sorry to hear you are receiving an error when trying to save your email campaign. You may need to refresh your page and add in a fresh block to your template. Make sure you are typing out your email and not copying and pasting, as this could cause issues with formatting and saving your campaign properly.
I would also suggest clearing the cache on your browser or going into safe mode. If the problems still persist, please email us at social_support(at)constantcontact(dot)com with your username, the name of the email campaign you are working on, and a reference to this post and we will investigate further!
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