Hari Vallabha commented
Sorry to hear that. Could you please try:
1. Delete all folders that start with “CC_LIBRARIES_PANEL_EXTENSION_xx_xx_xx” in this location: WIN: C:\Program Files (x86)\Common Files\Adobe\CEP\extensions MAC: Macintosh HD ▸ Library ▸ Application Support ▸ Adobe ▸ CEP -> extensions
2. Follow the steps from Solution 2 in this article: https://helpx.adobe.com/creative-cloud/kb/libraries-panel-not-working.html
Before trying the steps - please, 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.
If your issue persists even after the above-mentioned steps, please let us know.