Can someone explain to me, in layman terms please, what "502 Bad Gateway nginx" means?

I will try to explain this, but feel free to comment for further clarification. When you connect to a server through a network or the internet, that server communicates with other servers to get the data you want. That data flows down from the network to you (downstream).

And your request for data is sent out to the other servers so they know what you want (upstream). A 502 error means that one (or all) of the upstream servers trying to fill your request did something wrong. The server between you and them cannot decode their message or something and thus cannot get the data for you.

This is not an error on your computer, the servers did something wrong; and it is not something you can fix from a client perspective. If you manage a website and some reports a 502 error on your site to you, then you need to contact your hosting company to attempt to verify and resolve the error. Finally, the "nginx" portion of your message.

I believe that is referring to the software on the middle server that sent you the error. Nginx is an open source proxy server software package. In short, servers do not run operating systems as we understand them, but they run special server OSs.

A proxy allows several systems to look like the same system so that millions of people are not all hitting the same server at once.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.