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Users Receive "Cannot read properties of undefined" Error When Uploading Files with S3 Optimized Uploads and Encryption Enabled

Original Question or Issue:

Users are unable to upload files (e.g., .png files) despite having the appropriate permissions. Uploads fail using both drag-and-drop and the Upload button, displaying the error:

Cannot read properties of undefined

Environment:

  • Product - FileCloud Server
  • Version - 23.262
  • Platform - Windows, Linux

Steps to Reproduce:

  • Enable S3 Optimized Uploads.
  • Enable Encryption.
  • Navigate to a folder where the user has upload permissions.
  • Attempt to upload a file (e.g., a .png file) using drag-and-drop or the Upload button.
  • The upload fails and displays the error: 
    Cannot read properties of undefined

Error or Log Message:

 Cannot read properties of undefined 

Defect or Enhancement Number:

FCL-11720

Cause:

 This is a known product issue that occurs when S3 Optimized Uploads and Encryption are enabled simultaneously. The JavaScript error is a symptom of the underlying issue and does not indicate a permissions problem. 

Resolution or Workaround:

  • Verify whether both S3 Optimized Uploads and Encryption are enabled in the environment.
  • If both features are enabled, the issue is likely related to the known defect.
  • If possible, temporarily disable S3 Optimized Uploads.
  • If the issue persists without these features enabled, collect browser console logs and FileCloud logs for further investigation.

Additional Information:

  • The error is not caused by missing folder permissions.
  • Parent folder permissions are inherited by subfolders unless permission inheritance has been explicitly overridden.

Notes: