I have been having the same issue for about a week - 'send test' opens a preview with no box for addresses. The Preview option gives an error message. I also get an error message with I try to modify or create a contact. The problems don't occur when I use an incognito window in Chrome, but I would prefer not to have to do that.
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Hi @CyndyC4. I took a look at the bounces and saw two contacts had a vacation/auto-reply set which we consider a bounce/unsuccessful delivery. When I viewed their engagement, they both opened the email after the bounce was recorded so technically, they are recorded twice in the reporting, once as a bounce and once as an open.
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