Hi Geezer63rd
That is not a reported bug in that update, try installing the update again, to see if the exact same thing happens again, if it does, hide that update, so it does not install onto your PC, this should be resolved when the next cumulative update for version 1903 is released . ..
Download the tool from the link below, run that, in the list of pending updates, select that update and click 'Hide' that will stop windows from attempting to install it: