When trying file download it shows error route not found

This is in my blade file

{!! Html::link(storage_path().'/documents/'.$file->name, $file->name) !!}

This is controller

public function download($file_name){
    $file_path = storage_path('documents').'/'.$file_name;
    return response()->download($file_path);
}

Route

Route::get('documents/{file}','FilesController@download');

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