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(1/1) ErrorException

Trying to get property 'user_id' of non-object

in MaterialController.php (line 85)
at HandleExceptions->handleError(8, 'Trying to get property \'user_id\' of non-object', '/var/www/virtuales/fundacionvalora.org/app/Http/Controllers/MaterialController.php', 85, array('locale' => 'es', 'slug' => 'monopatin', 'item' => null))in MaterialController.php (line 85)
at MaterialController->show('es', 'monopatin')
at call_user_func_array(array(object(MaterialController), 'show'), array('locale' => 'es', 'slug' => 'monopatin'))in Controller.php (line 55)
at Controller->callAction('show', array('locale' => 'es', 'slug' => 'monopatin'))in ControllerDispatcher.php (line 44)
at ControllerDispatcher->dispatch(object(Route), object(MaterialController), 'show')in Route.php (line 203)
at Route->runController()in Route.php (line 160)
at Route->run()in Router.php (line 572)
at Router->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in RouteAfterMiddleware.php (line 21)
at RouteAfterMiddleware->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in HttpsProtocol.php (line 20)
at HttpsProtocol->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in SubstituteBindings.php (line 41)
at SubstituteBindings->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in VerifyCsrfToken.php (line 65)
at VerifyCsrfToken->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in ShareErrorsFromSession.php (line 49)
at ShareErrorsFromSession->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in StartSession.php (line 64)
at StartSession->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in AddQueuedCookiesToResponse.php (line 37)
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in EncryptCookies.php (line 59)
at EncryptCookies->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 102)
at Pipeline->then(object(Closure))in Router.php (line 574)
at Router->runRouteWithinStack(object(Route), object(Request))in Router.php (line 533)
at Router->dispatchToRoute(object(Request))in Router.php (line 511)
at Router->dispatch(object(Request))in Kernel.php (line 176)
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request))in Pipeline.php (line 30)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in CheckForMaintenanceMode.php (line 46)
at CheckForMaintenanceMode->handle(object(Request), object(Closure))in Pipeline.php (line 148)
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))in Pipeline.php (line 53)
at Pipeline->Illuminate\Routing\{closure}(object(Request))in Pipeline.php (line 102)
at Pipeline->then(object(Closure))in Kernel.php (line 151)
at Kernel->sendRequestThroughRouter(object(Request))in Kernel.php (line 116)
at Kernel->handle(object(Request))in index.php (line 53)