If there is an error in the program, a friendly error prompt will be returned to the user in the browser, which is collectively called server 500 error.

Program errors are usually caused by problems with the server of the network service provider you are connected to! There are three ways to solve this problem. One is to call the network provider to solve the problem on-site or online! The second is to change the IP address of DNS server in electronic equipment! Third, restart the Internet router!