mkdir(): No such file or directory 报错 求详细修改教程，小白，宝塔软件 APACHE环境

Question

[2] ErrorException in Wechat.php line 28
mkdir(): No such file or directory
public function __construct($config=array()) {

      $this->wxconfig=$config;//关注时回复anywn
     $this->share=$config;
     $this->keyset=$config;//关键词列表anywn    
     $this->config= $config;    
     $this->siren=$config;
     $this->baseurl = "Uploads/".$config["appid"];
      if(!is_dir($this->baseurl)) {mkdir($this->baseurl,'0777');}
      $this->request=Request::instance();

}

public function testaa(){
print_r('testa');exit;
}
public function openmsg($wx)
{
Call Stack
in Wechat.php line 28
at Error::appError(2, 'mkdir(): No such fil...', '/www/wwwroot/saolei/...', 28, ['config' => ['name' => 'danran', 'logo' => 'http://wx.ye33w.cn/g...', 'cdnurl' => '', ...]])
at mkdir('Uploads/wx74ef6c0095...', '0777') in Wechat.php line 28
at Wechat->construct(['name' => 'danran', 'logo' => 'http://wx.ye33w.cn/g...', 'cdnurl' => '', ...]) in User.php line 43
at User->_initialize() in Controller.php line 59
at Controller->construct(object(Request))
at ReflectionClass->newInstanceArgs([object(Request)]) in App.php line 359
at App::invokeClass('app\index\controller...') in Loader.php line 479
at Loader::controller('user', 'controller', false, 'Error') in App.php line 581
at App::module(['index', 'user', 'wxlog'], ['app_host' => '', 'app_debug' => '1', 'app_trace' => '', ...], null) in App.php line 457
at App::exec(['type' => 'module', 'module' => ['index', 'user', 'wxlog']], ['app_host' => '', 'app_debug' => '1', 'app_trace' => '', ...]) in App.php line 139
at App::run() in start.php line 19
at require('/www/wwwroot/saolei/...') in index.php line 18