当我用nginx + uwsgi部署django项目时，总是出现“ 502错误的网关错误”。是什么原因？

Question

当我在浏览器中输入IP时，页面将显示502 Bad Gateway。这是我的配置文件错误吗？ / etc / nginx / sites-enabled / fefault：

WebDriverWait(browser,10).until(EC.frame_to_be_available_and_switch_to_it(By.XPATH, "//div[@id='innerframe']/iframe"))

browser.find_element_by_xpath("//div[@id='mediacontent']//video").text

/home/sscc/sscc2019/uwsgi.ini：

server {
    listen 80;
    root /var/www/html;

    # Add index.php to the list if you are using PHP
    index index.html index.htm index.nginx-debian.html;

    server_name 127.0.0.1;

    location / {
            # First attempt to serve request as file, then
            # as directory, then fall back to displaying a 404.
            #try_files $uri $uri/ =404;
            include uwsgi_params;
            uwsgi_pass 47.101.157.128:8000;
    }
    location /static{
            alias /var/www/sscc2019/static/;
    }