What does it mean that there is an error in the internal server when Meituan logs in?

When Meituan logs in, the internal server error is caused by the login error, and the solution is as follows:

1. First, you need to click my option below to enter, as shown in the figure.

2. Next, you need to click the Login/Register button to enter, as shown in the figure.

3. Next, you need to enter your mobile phone number in it, and then click the get SMS verification code button.

4. Next, you need to enter the received SMS verification code, as shown in the figure.

5. Finally, you can successfully log in to the US group for takeaway, as shown in the figure.