Web Platform Installer
Cannot install PHP Manager for IIS in IIS 10
Re: Cannot install PHP Manager for IIS in IIS 10
Jan 19, 2018 10:33 PM|nemchik|LINK
The registry edit should be all that's needed. Change the value from 10 to 8 prior to the install, and then change it back after the install.
I can confirm this to be the issue on multiple Win10 machines and multiple Server 2016 machines as well.