Brilliant!
This worked for me as well.
https://www.microsoft.com/en-us/software-download/windows10
After huge grief trying to get 1803 into my machine last year, I have been hiding from Microsoft behind 'Metered connection' When I finally finally let them in this month, they sent the May 1019 update and surprise, surprise, I was back in the old install-failure loop. However using the exe on the above link worked. (It did take an age though).