I have managed to get php v8 working and my URL Rewrites working (I think) on my Grav site on Windows 10 IIS 10.0
I downloaded a skeleton, and extracted the files into my wwwroot folder.
When I browse to the site I get the following error:
0 - syntax error, unexpected token "match"
I turned on full backtrace for error logging and the issue seems to lie in the C:\inetpub\wwwroot\grav-skeleton-landio-site\vendor\willdurand\negotiation\src\Negotiation\Negotiator.php file:
I have tried this with two skeletons, and the error is the same.