Via Bleeping Computer at Microsoft pushes Windows 10 KB4023057 again to fix update issues:
See the referenced BC article and KB4023057: Update for Windows 10 Update Service components for notes about the update as well as additional information regarding low disk space and compressing files.
Microsoft is rolling out the KB4023057 update again to all versions of Windows 10 to ensure that devices can successfully install new updates as they are released.
KB4023057 is being released to offer "reliability improvements to Windows Update Service components" in Windows 10 1507, 1511, 1607, 1703, 1709, 1803, 1909, 2004, 20H2, and 21H1.
See the referenced BC article and KB4023057: Update for Windows 10 Update Service components for notes about the update as well as additional information regarding low disk space and compressing files.