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

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