This is generally caused by a <div> tag in the header of your webform. To resolve this:
  1. Go to Web Page Designer
  2. Click Next until you get to Configure Content
  3. Click the topmost gear icon to edit your header
    User-added image
  4. Click the View tab, then click Code
  5. Remove any lines that start with <div> or </div>​
    • NOTE: This may cause design issues. Please consult with your web design team before doing.
  6. Click Update
  7. Click Save
  8. Click Submit to finalize changes