I can't add an email list to my campaign. In the email settings dialog box, there is an error below Recipients that reads: Record not found by seq id!
I'm sorry that you are getting that error message. After checking on this I did find that this is a known error right now that we are investigating. I have found that if you copy the campaign, and then go to schedule it that will solve the problem. If you'd like, I could make a note on your account for someone to contact you when resolved. I'm so sorry about the trouble!