Slim Framework: Some method is not resolvable : I am new on Slime.
Work on API project. Everything good until I have to add a new endpoint (new method too) and I got this Error for my new endpoint, another endpoint run well. Below is error log:

    Type: RuntimeException
    Message: [{“container”:{}},“getNotification”] is not resolvable
    File: /opt/vestia/api/vendor/slim/slim/Slim/CallableResolver.php
    Line: 104
    Trace

    #0 /opt/myanime/api/vendor/slim/slim/Slim/CallableResolver.php(62): Slim\CallableResolver->assertCallable(Array)
    #1 /opt/myanime/api/vendor/slim/slim/Slim/CallableResolverAwareTrait.php(45): Slim\CallableResolver->resolve(‘UserController:…’)
    #2 /opt/myanime/api/vendor/slim/slim/Slim/Route.php(333): Slim\Routable->resolveCallable(‘UserController:…’)
    #3 /opt/myanime/api/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(122): Slim\Route->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #4 /opt/myanime/api/vendor/slim/slim/Slim/Route.php(316): Slim\Route->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #5 /opt/myanime/api/vendor/slim/slim/Slim/App.php(476): Slim\Route->run(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #6 /opt/myanime/api/src/MyanimeMiddleware.php(121): Slim\App->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #7 [internal function]: App\MyanimeMiddleware->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
    #8 /opt/myanime/api/vendor/slim/slim/Slim/DeferredCallable.php(43): call_user_func_array(Object(App\VestiaMiddleware), Array)
    #9 [internal function]: Slim\DeferredCallable->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
    #10 /opt/myanime/api/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(73): call_user_func(Object(Slim\DeferredCallable), Object(Slim\Http\Request), Object(Slim\Http\Response), Object(Slim\App))
    #11 /opt/myanime/api/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(122): Slim\App->Slim{closure}(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #12 /opt/myanime/api/vendor/slim/slim/Slim/App.php(370): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #13 /opt/myanime/api/vendor/slim/slim/Slim/App.php(295): Slim\App->process(Object(Slim\Http\Request), Object(Slim\Http\Response))
    #14 /opt/myanime/api/public/index.php(35): Slim\App->run()
    #15 {main}


My routes for new endpoit: 
    
    $app->get('/user/notification', 'UserController:getNotification');

My class:

    class UserController{
        public function __construct($container)
        {
            // make the container available in the class
            $this->container = $container;
        }

        public function getNotification($request, $response, $args){
			//my code here
	    }
    }

tried to `composer dump-autoload` but that did not work. please help.