CLFC-50020 "Empty Folder Listing" Errors in FileCloud Sync

Original Question or Issue:

A customer reported that the FileCloud Sync client was displaying repeated CLFC-50020 – Empty Folder Listing errors while synchronizing network folders. Although the Sync client reported the folders as empty, the same folders and files were accessible through the FileCloud Web UI.

Environment:

Product - FileCloud Sync
Version - 21.3.x
Platform - Windows

Steps to Reproduce:

Configure FileCloud Sync to synchronize network folders.
Open the Sync Activity window.
Observe multiple entries reporting:

CLFC-50020 – Empty Folder Listing

Verify the same folders through the FileCloud Web UI.
The folders and files are accessible in the Web UI despite the Sync client reporting errors.

Error or Log Message:

CLFC-50020 - Empty Folder Listing

Displayed in the Sync Activity window for multiple synchronized folders.

Defect or Enhancement Number:

Cause:

The issue was isolated to a single user's workstation.

Review of the logs and customer-provided screenshots indicated:

The folders were accessible through the FileCloud Web UI.
No evidence suggested a server-side permission issue.
Only one user experienced the problem.
The affected workstation was running an outdated FileCloud Sync client (v21.3.2.7501).

This pointed to a local Sync client installation or cached configuration issue rather than a FileCloud Server issue.

Resolution or Workaround:

The customer resolved the issue by performing a clean installation of the FileCloud Sync client:

Stop the FileCloud Sync client.
Back up and remove the FileCloud Sync data and configuration under:
```
%AppData%\FileCloudSyncData
```
Install the latest supported FileCloud Sync client.
Reconfigure the synchronization folders.
Allow the initial synchronization to complete.
Verify that the affected folders synchronize successfully.

After completing these steps, the customer confirmed that the CLFC-50020 errors no longer occurred.

Notes: