panel show blank page

I using default config:

`/*
* Enable the Stats Panel?
*/
'stats_panel_enabled' => true,

/*
* Stats Panel routes before filter
*
*/
'stats_routes_before_filter' => '',

/*
* Stats Panel routes after filter
*
*/
'stats_routes_after_filter' => '',

/*
* Stats Panel routes middleware
*
*/
'stats_routes_middleware' => 'web',

/*
* Stats Panel template path
*/
'stats_template_path' => '/templates/sb-admin-2',

/*
* Stats Panel base uri.
*
* If your site url is http://wwww.mysite.com, then your stats page will be:
*
* http://wwww.mysite.com/stats
*
*/
'stats_base_uri' => 'stats',

/*
* Stats Panel layout view
*/
'stats_layout' => 'pragmarx/tracker::layout',

/*
* Stats Panel controllers namespace
*/
'stats_controllers_namespace' => 'PragmaRX\Tracker\Vendor\Laravel\Controllers',`

I have column `is_admin` on my user table on main database. and set as 1 for admin user.
but it show blank page.

what i'm doing wrong?
i'm using laravel 5.4.

Start with the shown tracker configuration, especially stats_base_uri, stats_layout, and stats_template_path, then open the generated stats URL in the Laravel 5.4 application. Check the application response and logs to determine why the panel is blank. Done means the stats panel displays for the configured admin user.

Written by the indexing model from the issue text.