Whats the best way to fix this? Unable to load your default controller. Please make sure the controller specified in you

[eluser]behnampmdg3[/eluser]

An Error Was Encountered

Unable to load your default controller. Please make sure the controller specified in your Routes.php file is valid.

Thanks

[eluser]Unknown[/eluser]
go to config > routers.php and see the value of default_controller

make a controller in controllers folder with the same value