[Your Block] saved to Cover category should have at least one headline element linked to the Event Title property.
A headline element must be set to our event title property. This means that when a user chooses a particular theme, his or her event title will dynamically populate once the page loads.
1. Click Cover Block.
2. Find the headline element that is acting as the event title.
3. Click that element to access the dropdown options.
4. Select the Properties item and make sure that the Page Element is flagged as the Event Title utilizing the drop down.