Assets

I teach Adobe Animate at a college. Recently I was updating the app and discovered, when updating a lecture about the user interface, that there are no assets. There are no custom or default assets for animated, static and sound clips. At the bottom of the panel there is a message that says the download failed. Next to the message is a cloud with an arrow icon that when I clicked, gave me an error message and froze the app. I have images of both. I am at a loss about this. I also uninstalled and then reinstalled but I am having the same issues. Are canned assets no longer included? Anyone else experiencing this? Is there a solution?

Thank you in advance for your help.