App\Services\ArticleService::findSlug(): Return value must be of type Illuminate\Database\Eloquent\Model, null returned

TypeError: App\Services\ArticleService::findSlug(): Return value must be of type Illuminate\Database\Eloquent\Model, null returned in file /home/tehnomehanik/wcms-api/app/Services/ArticleService.php on line 394 #0 /home/tehnomehanik/wcms-api/app/Http/Controllers/Api/Web/ArticleController.php(43): App\Services\ArticleService->findSlug('gps') #1 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(54): App\Http\Controllers\Api\Web\ArticleController->showBySlug('gps') #2 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(45): Illuminate\Routing\Controller->callAction('showBySlug', Array) #3 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Route.php(261): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(App\Http\Controllers\Api\Web\ArticleController), 'showBySlug') #4 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Route.php(204): Illuminate\Routing\Route->runController() #5 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Router.php(725): Illuminate\Routing\Route->run() #6 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(141): Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request)) #7 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php(50): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #8 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Routing\Middleware\SubstituteBindings->handle(Object(Illuminate\Http\Request), Object(Closure)) #9 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(126): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #10 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Middleware/ThrottleRequests.php(62): Illuminate\Routing\Middleware\ThrottleRequests->handleRequest(Object(Illuminate\Http\Request), Object(Closure), Array) #11 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Routing\Middleware\ThrottleRequests->handle(Object(Illuminate\Http\Request), Object(Closure), '2000', '1') #12 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(116): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #13 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Router.php(726): Illuminate\Pipeline\Pipeline->then(Object(Closure)) #14 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Router.php(703): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request)) #15 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Router.php(667): Illuminate\Routing\Router->runRoute(Object(Illuminate\Http\Request), Object(Illuminate\Routing\Route)) #16 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Routing/Router.php(656): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request)) #17 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(167): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request)) #18 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(141): Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request)) #19 /home/tehnomehanik/wcms-api/vendor/fruitcake/laravel-cors/src/HandleCors.php(52): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #20 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Fruitcake\Cors\HandleCors->handle(Object(Illuminate\Http\Request), Object(Closure)) #21 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #22 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure)) #23 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull->handle(Object(Illuminate\Http\Request), Object(Closure)) #24 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #25 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(40): Illuminate\Foundation\Http\Middleware\TransformsRequest->handle(Object(Illuminate\Http\Request), Object(Closure)) #26 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\TrimStrings->handle(Object(Illuminate\Http\Request), Object(Closure)) #27 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #28 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\ValidatePostSize->handle(Object(Illuminate\Http\Request), Object(Closure)) #29 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(86): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #30 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Foundation\Http\Middleware\PreventRequestsDuringMaintenance->handle(Object(Illuminate\Http\Request), Object(Closure)) #31 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Http/Middleware/HandleCors.php(62): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #32 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Http\Middleware\HandleCors->handle(Object(Illuminate\Http\Request), Object(Closure)) #33 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php(39): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #34 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(180): Illuminate\Http\Middleware\TrustProxies->handle(Object(Illuminate\Http\Request), Object(Closure)) #35 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(116): Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request)) #36 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(142): Illuminate\Pipeline\Pipeline->then(Object(Closure)) #37 /home/tehnomehanik/wcms-api/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(111): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request)) #38 /home/tehnomehanik/wcms-api/public/index.php(52): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request)) #39 {main}

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