Libraries sync error

first, update your os and then restart your computer. 

if that fails, and you have a mac, grant disc access to your cc desktop app - system preferences > security & privacy > privacy > full disk access > cc desktop app (in the midst of this step if you see an alert about granting cc libraries disk access, allow it and you're dont)

if that fails proceed to the following steps: 

quit all Adobe related products

kill all the CCLibraries processes in task manager (win)/activity montor (mac).

Delete all folders that start with "CC_LIBRARIES_PANEL_EXTENSION_xx_xx_xx" in this location*

Follow the steps of Solution 2 in this article: https://helpx.adobe.com/creative-cloud/kb/libraries-panel-not-working.html 

*

WIN: C:\Program Files (x86)\Common Files\Adobe\CEP\extensions

MAC: Macintosh HD⁩ ▸ ⁨Library⁩ ▸ ⁨Application Support⁩ ▸ ⁨Adobe⁩ ▸ ⁨CEP⁩ -> extensions