I'm sorry to hear you've had this experience with your newsletter! Did you receive any error messages? Have you tried working in a different browser or a private/incognito window? Also, what section of your campaign were you working on? Were you able to see changes in a test email? Once we have these details along with the name of the campaign you're working in we can help troubleshoot this further for you.
Frankie P. Community & Social Media Support
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