[SOLVED]Don't work admin-panel and authorization in laravel5.3's project

I make admin-panel at laravel 5.3. I try to install sleepingowl 4. All project I make according to the official documentation.All project operate as expected (http://blog.laravel/). But...if I go the link

 http://ift.tt/2lMCSI3

than apache issues :

 Not Found

 The requested URL /admin was not found on this server.

After I try to use authorization. I make new project which named "auth". But ... if I go the link:

 http://auth/signup 

apache issues too...:

 Not Found

 The requested URL /signup was not found on this server.

All rights are open to write-rewrite. All my steps according of the oficcial documentation :

 http://ift.tt/2k8i1OE

I don't know what I doing wrong. Please, tell me what can I do
There are the links of github:

 http://ift.tt/2lMtELN  - this is my project, where I make admin-panel.

 http://ift.tt/2lgbI9m  -  this is project of authorization

 file public /.htaccess:

<IfModule mod_rewrite.c>
<IfModule mod_negotiation.c>
    Options -MultiViews
</IfModule>

RewriteEngine On

# Redirect Trailing Slashes If Not A Folder...
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R=301]

# Handle Front Controller...
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L]

# Handle Authorization Header
RewriteCond %{HTTP:Authorization} .
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
</IfModule>

via Александр