Yep, I have this problem too. Bought a mini PC with W10 in Jan, which has managed to install some updates, but not the ones mentioned. It downloads the updated version of W10 required every day and then fails to install. This has happened every day since January. I spoke to the tech where I bought it who said, wait and see if Microsoft comes up with anything, but I will try and return the product this week. I figure the product was not sold to me as fit for purpose since it can't download updates and, as it has the home version, you can't turn the update off.
Pretty fed up with it actually.
I'm not sure how this is really the fault of the retailer. Lots of people are having issues with it including me on multiple machines. At the end of the day the fix is a reinstall.
Does the mini PC even have enough HDD space for the update?