Slim Application Error

The application could not run because of the following error:

Details

Type: Invoker\Exception\NotEnoughParametersException
Message: Unable to invoke the callable because no value was given for parameter 4 ($slug)
File: /home/eprofess/eprofess_businessenglishcorner/vendor/php-di/invoker/src/Invoker.php
Line: 75

Trace

#0 /home/eprofess/eprofess_businessenglishcorner/vendor/php-di/slim-bridge/src/ControllerInvoker.php(50): Invoker\Invoker->call(Array, Array)
#1 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/Route.php(281): DI\Bridge\Slim\ControllerInvoker->__invoke(Array, Object(Slim\Http\Request), Object(Slim\Http\Response), Array)
#2 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\Route->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
#3 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/Route.php(268): Slim\Route->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
#4 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/App.php(503): Slim\Route->run(Object(Slim\Http\Request), Object(Slim\Http\Response))
#5 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/MiddlewareAwareTrait.php(117): Slim\App->__invoke(Object(Slim\Http\Request), Object(Slim\Http\Response))
#6 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/App.php(392): Slim\App->callMiddlewareStack(Object(Slim\Http\Request), Object(Slim\Http\Response))
#7 /home/eprofess/eprofess_businessenglishcorner/vendor/slim/slim/Slim/App.php(297): Slim\App->process(Object(Slim\Http\Request), Object(Slim\Http\Response))
#8 /home/eprofess/eprofess_businessenglishcorner/src/Portal/index.php(15): Slim\App->run()
#9 /home/eprofess/eprofess_businessenglishcorner/public/index.php(2): include('/home/eprofess/...')
#10 {main}