Publish to Web with Rise

Hi April! 

Do your Storyline blocks contain audio or video on the first slide? If so, then you'll see a gray or black cover with a  play button appear before the first slide of the Storyline content. Clicking the play button should display the Storyline block.

You can prevent the play button by adding an introductory slide (with no audio or video) before the first slide in the Storyline Block.

Let me know if that helps you!