Maybe in your php.ini the php.zip extension needs to be enabled:
https://learn.getgrav.org/basics/requirements#php-requirements
point 2-4:
- On a local machine you don’t have to move to var/www…you can simply name the folder homepage, etc.
- I don’t need to change owner rights for my grav folder on my linux mint pc.
- I don’t have to install apache2