I'm so sorry you're experiencing this issue! What is the exact error message you are getting? What are you doing when the error message pops up (saving, pasting in text, formating text, inserting an image, etc.)?
If you could e-mail us at social_support(at)constantcontact(dot)com with your username, the name of the campaign you experienced the error with, and a reference to this post we can investigate further and hopefully resolve the issue.
Nick S. Social Media & Content Manager
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