Let us find the root cause of the problem.
To simplify things, please download and let the update fail once. It will leave a trace for the failure.
Then, do the following:
Open your File Explorer and go to your system drive, which is commonly C drive.
Navigate to Windows>Logs>CBS folder.
You may need to check the Hidden items option under the View tab in tool bar to show the Logs folder.
Right-click on the CBS.log file and select Copy.
Paste it to your desktop.
Go to your OneDrive account and upload CBS.log from the Desktop.
Share the link of the CBS log and post it in the next reply.