It is a third-party software (likely Avast - at least I know that it creates tdf#119910) that had been installed prior to LibreOffice, and that installed a system component (UCRT) improperly, which breaks proper detection of the component’s presence and installation on the system.
In the next versions (6.1.3+), we have implemented a way to automatically “repair” in this case. Also, as a workaround, you may install the component from MS site - unpack the archive and launch an MSU that matches your OS (you haven’t mention it in your question, btw; see “Details” on the download site).