"No items" error in "Shared Files"

Hello.

When the user clicks on Shared Files in the Alfresco Share menu, a red bar with "No items" text appears and nothing is displayed. The catalina.out file says this:

Caused by: java.lang.IllegalStateException: Invalid shared home path: /app:company_home/app:shared - found: 0

So, I wonder if there is some kind of missing folder that required to be created to make it work. How can I re-create that path?

This happened me after upgrading to 5.1 from 4.2. Everything else works fine.

I will appreciate your help, I haven't help similar posts related to this.