Might try manual download and install.
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4592484
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4592495
you'll only need one or the other, KB4592495 is security only. Also check the prerequisite SSU has been downloaded and installed.
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4566425
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