Hi Millie,
Happy to help!
I took a look at the logo in your project file and saw that it wasn't loading properly.
For the Modern Player, you'll want to make sure that your logo does not exceed 170 pixels in height. You can check out this article for more information on adding a logo to the Player in Storyline 360.
If your logo meets the requirements listed in the article, would you be willing to share a copy of your logo image here or in private by opening a support case for testing? We'll delete it when we're done!
Thank you! It was the logo size.
