Erro 406（不可接受）jquery文件上传删除文件

I am having trouble deleting the files with jquery fileupload . by clicking delete the error happens , do not delete the file . Error message:

upload/server/php/index.php?file=xxxx.png 406 (Not Acceptable)

Hpierce This is the code to which it refers

public function delete($print_response = true){
    $file_names = $this->get_file_names_params();
    if (empty($file_names)) {
        $file_names = array($this->get_file_name_param());
    }
    $response = array();
    foreach($file_names as $file_name) {
        $file_path = $this->get_upload_path($file_name);
        $success = is_file($file_path) && $file_name[0] !== '.' && unlink($file_path);
        if ($success) {
            foreach($this->options['image_versions'] as $version => $options) {
                if (!empty($version)) {
                    $file = $this->get_upload_path($file_name, $version);
                    if (is_file($file)) {
                        unlink($file);
                    }
                }
            }
        }
        $response[$file_name] = $success;
    }
    return $this->generate_response($response, $print_response);
}

I have the same problem