Trouble getting started

I downloaded CI4, extracted the files and renamed the folder to ci4.
Then i added a virtual host:

Code:

<VirtualHost 127.0.0.1:80>
DocumentRoot "C:\Program Files (x86)\Ampps\www\ci4\public"
ServerName ci4.dev
</VirtualHost>

And "127.0.0.1  ci4.dev" to the Windows hosts file.

When i go to ci4.dev i get:

The ci4.dev page isn’t working

ci4.dev is currently unable to handle this request.

And the following in the error log:

[Tue Jun 28 07:13:08.222286 2016] [:error] [pid 4596:tid 1300] [client 127.0.0.1:64646] PHP Fatal error:  Uncaught Error: Class 'Config\\App' not found in C:\\Program Files (x86)\\Ampps\\www\\ci4\\public\\index.php:237\nStack trace:\n#0 {main}\n  thrown in C:\\Program Files (x86)\\Ampps\\www\\ci4\\public\\index.php on line 237

I also changed RewriteBase to "/ci4".

PHP version is 7.