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.