When I test an email campaign, the button that links to a Package Landing Page does not work.
This may happen because your email is not associated with an account on the campaign. The button will only take a real user, associated with a real account, to the embedded URL. Your customers will be able to click the call to action button and see the corresponding page because their email is associated with a real business account in the selected market. You will not be able to test it under most circumstances, because you are not the customer.
To test the Package Landing Page button: