I've installed Dnn 9.0.2 on my local dev machine, everything installed just fine.
For some reason I get a 404 for the default page '/'.
I've checked the Site Settings to make sure the Home Page is correctly selected, which it is.
I don't see any kind of strange redirects happening in Firebug.
Any other reasons why this might happen?
Edit:
I changed the Site Settings > Home Page to any other random page and logged out. It worked, no 404. Changed it back to Home, 404 returns.
The URL value for each page Home and RandomPage changes to '/' when set to be the home page, but it works for RandomPage and not for Home.