Thank you for reaching out to us through the Community. I am sorry to hear that you are experiencing this issue. I will like to look into this for you. What type of campaign are you trying to create? Is it an event, email, survey, etc.? Could you provide a screenshot of the error page or pop-up that is stating that there's an issue with the activation of the campaign? If you could answer these questions, it will help us source out the issue. Thank you!