Error 0x80073701 is ERROR_SXS_ASSEMBLY_MISSING; it means there are some system files are missing, which caused the update installation failure.
Windows Updates failed to install Error 0x80073701
If there were problems installing some updates, with error code 0x80073701 & message ERROR_SXS_ASSEMBLY_MISSING in Windows 11/10 see this post.www.thewindowsclub.com
instructions there on how to rectify ( or attempt to )