Hi there,
A very quick and short blog-post.
While installing a new on-prem server for a client, we got the following error while installing the Sitecore prerequisites.

So it seems that Microsoft has moved the download location of the Web Platform Installer v5. Sitecore provides us (when you do an on-prem install) with SIF scripts to install the prerequisites, so you won’t have to go into a new server and download all the software yourself. However, this time they suddenly moved the location and renamed the .msi file.
As described here, more people ran into this. So previously in Prerequisites.json the following was specified:
“WebPlatformDownload”: {
“Type”: “String”,
“Description”: “Download location of Microsoft Web Platform Installer 5.0”,
“DefaultValue”: “https://download.microsoft.com/download/C/F/F/CFF3A0B8-99D4-41A2-AE1A-496C08BEB904/WebPlatformInstaller_amd64_en-US.msi“
}
Which should now be updated to:
“WebPlatformDownload”: {
“Type”: “String”,
“Description”: “Download location of Microsoft Web Platform Installer 5.0”,
“DefaultValue”: “https://download.microsoft.com/download/8/4/9/849DBCF2-DFD9-49F5-9A19-9AEE5B29341A/WebPlatformInstaller_x64_en-US.msi“
}
So the next time you will run Install-SitecoreConfiguration -Path .\Prerequisites.json the script will work as expected.

Small fix, big rewards 😉
Happy Sitecore-ing!
— Robbert