After installation Yii2, I try to navigate with pages of application, and in url I have problem with slashes

http://website.dev/index.php?r=site%2Fabout
http://website.dev/index.php?r=site%2Fcontact
http://website.dev/index.php?r=site%2Floginite%2Floginite%2Flogin

I want to slashes in url in place of %2F