Thank you for reaching out. I’d like to let you know that this specific update (KB5063878) has been reported by several users to cause installation issues. Reports show that it may conflict with certain storage drivers or SSDs. Microsoft is already aware of the issue and will be delivering a fix in an upcoming release.
In the meantime, the best step is to temporarily hide or pause this update so your system does not keep retrying and failing. You can do this with the official Microsoft tool “Show or hide updates”: Download Show or Hide Updates Troubleshooter, run the troubleshooter, and click on 'Advanced' and make sure to check the box for "Apply repairs automatically."
Once Microsoft pushes the corrected version, you can safely install it without these errors.
Let me know if you still have questions.
All the best!
Note: Please use the Add a comment section below this message to reply, instead of using the Answer field, so that I’ll be notified of your response.