If the Storyline publishing process ends suddenly without showing an error message, there may be a problem with the image file used for your course logo.
This issue was fixed in Update 4 for Storyline 1. To take advantage of the new features and fixes, download and install the latest version from the link in your product confirmation email, or get it here. Then republish your project.
If your logo is missing after installing Update 4, see this article for more information.