php安装插件后报错

$config = [
            'path' => public_path() . '/excel/',
        ];
$fileName = $fileName . '.xlsx';
$xlsxObject = new \Vtiful\Kernel\Excel($config);

Vtiful\Kernel\Exception: Configure 'path' directory does not exist in 

$config = [
            'path' => public_path() . '/excel/',
        ];