The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.
原因:可能是重复跑了好几次代码,导致服务器崩溃
方法1:关机重启,,不太方便
方法2:https://blog.csdn.net/weixin_41733260/article/details/100532091
一般flask启动时监听的是5000端口,如果修改的话更改后面的端口号
找出端口5000的进程,将进程杀死
netstat -ano | findstr 5000
taskkill /pid XXXXX /f (XXXXX的地方用进程号替换)