Although it is not always the case, this error is generally caused when the eFileCabinet Client does not update correctly.

To fix this error:

1. Close the eFileCabinet client

2. Go to C:\ProgramData\eFileCabinet\5 and rename the "client_settings.edb" file to "client_settings.edb.old" 

3. RE-open the eFileCabinet client and log in again.

After the client updates, the issue should be resolved.  


Note: ProgramData is a hidden folder by default. To un-hide the folder follow the steps based on your operating system:
-Windows 10: Control Panel>Appearance and Personalization>File Explorer Options>View.  Select the radio button next to "Show hidden files, folders, and drives".
-Windows 7 & 8: Control Panel>Appearance and Personalization>Folder Options>View.  Select the radio button next to "Show hidden files, folders, and drives".