I am upgrading from 11.4.2 to 11.4.3 on our primary server and the process completed with Errors.

I get the following message when I log into the Zone:

Your zone is being upgraded to ZENworks 11.4.3. However, the following Primary Servers in this zone have not yet been upgraded to ZENworks 11.4.3. You need to take these servers offline, and manually upgrade them at the earliest.
Note: If any of these servers are in the process of being upgraded, you can ignore this warning. They will be removed from this list once the Agent refresh is completed.

And when I check on the deployment status this is the error shown:
An error occurred when trying to execute the move file command (${ZENWORKS_TEMP}/confFilesBackup/${UPDATE_GUID}/loader;${ZENWORKS_CONF}/loader) on the device. Check the system-update.log on the device for details.

I've had a look in the deployment folder and I can see a loader.bak folder but no loader folder.

The actual error in the system-update.log is:
[DEBUG] [10/17/2016 20:13:49.156] [6328] [ZENUpdater] [] [SYSTEM] [SystemUpdate] [] [DEBUG] [Attempting to move file C:\Program Files (x86)\Novell\ZENworks\temp/confFilesBackup/5011040300fc50000000002016100814/loader to C:\Program Files (x86)\Novell\ZENworks\conf/loader] [] [] [ZENworks]
[DEBUG] [10/17/2016 20:13:49.156] [6328] [ZENUpdater] [] [SYSTEM] [SystemUpdate] [] [DEBUG] [Could not find file 'C:\Program Files (x86)\Novell\ZENworks\temp/confFilesBackup/5011040300fc50000000002016100814/loader'. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)