Hi,
Sorry, you're facing this problem. Could you please try:
Follow the steps from Solution 2 in this article: https://helpx.adobe.com/creative-cloud/kb/libraries-panel-not-working.html
Make sure you've killed CCLibraries process in Task Manager / Activity Monitor, as well as quitting all Adobe related products. This is mentioned in steps 1 and 2 of the article, but I wanted to point it out because it's important.
Let me know if the issue still exists after following these steps!
Thank you,
Akshay