@aronimus CA will work with PHP 5.6 or better. VC9/VC11/VC14 reflects how PHP is compiled on Windows and shouldn't matter specifically for CA. Just make sure you're running Apache, PHP and related extensions all compiled in the same VC* environment.
@naeemmuhammad The user needs to have write access to those fields. You do not have to set the flag directly.
@teresaazevedo08 It's a bug. It's not saving "has no access" entries for groups. We'll look into fixing it soon.