Hello. It's the latest cumulative update, KB4505903. Within Settings -> Update & Security -> Windows Update, it appears under "Additional updates available", and I click "Download and install now". The text at the top changes to "Checking for updates", then "Updates are available". Underneath that it says "2019-07 Cumulative Update for Windows 10 Version 1903 for x64-based Systems (KB4505903)", and "Status: Getting things ready". This then changes to "Status: Installing 0%", "Status: Installing 12%", etc. Eventually it gets to "Status: Installing 100%" and stays there for a few seconds. Then the text changes to say "There were problems installing some updates, but we'll try again later", and below that it says "2019-07 Cumulative Update for Windows 10 Version 1903 for x64-based Systems (KB4505903) -Error 0x800f0982", with a button underneath saying "Retry". I hope this fully answers your question.