Install Parallels Desktop on MAC "To get a list of available systems, connect your Mac to the Internet"

I have searched a lot on the Internet for this question, but there is no suitable answer. Finally, I found that the problem can be solved in this way.
1 Let’s first look at the host file "command + shift + g" as shown in the figure below,

and then enter "/etc" in the text box
2 Drag and drop the host file to the desktop, open it and look at the network configuration of the PD inside,

you will find something in the picture below

3 Delete the content in the picture, then change the host, and then drag it back, if you can’t drag it back, Then modify directly in the above folder
4 and then restart the PD software
5 and finally solve the problem