Can not store session value.

you did not put any value?

$value = $request->session()->put('abc','my value');

https://laravel.com/docs/5.8/session#storing-data

@leostereo it looks like it's not a web route (specified not in web.php), so the session was not initialized. Or StartSession middleware was not included for this route.

Check your app/Http/Kernel.php class

/**
 * The application's route middleware groups.
 *
 * @var array
 */
protected $middlewareGroups = [
    'web' => [
        // ...
        \Illuminate\Session\Middleware\StartSession::class, // <- this middleware is responsible for initializing sessions
        // ...
    ],

    'api' => [
        'throttle:60,1',
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
    ],
];

Thanks !!! It worked , I was working with api routes , so doing:

   protected $middlewareGroups = [
       'web' => [
           \App\Http\Middleware\EncryptCookies::class,
           \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
           \Illuminate\Session\Middleware\StartSession::class,
           // \Illuminate\Session\Middleware\AuthenticateSession::class,
           \Illuminate\View\Middleware\ShareErrorsFromSession::class,
           \App\Http\Middleware\VerifyCsrfToken::class,
           \Illuminate\Routing\Middleware\SubstituteBindings::class,
       ],

       'api' => [
           \Illuminate\Session\Middleware\StartSession::class,
           'throttle:60,1',
           'bindings',
       ],
   ];

btw ... looking at session documentation it does not mention anything about this line. Thankyou.

From the docs

The api.php file contains routes that the RouteServiceProvider places in the api middleware group, which provides rate limiting. These routes are intended to be stateless, so requests entering the application through these routes are intended to be authenticated via tokens and will not have access to session state.