My website going 502 error

I found it perfectly working. Did not find any 502 error.

It's a server error. Will go away automatically. If not, talk to your host

In fact, 502 error may be due to various problems.
1. Server failure: The gateway receives a negative result if the target server has failed completely, among other things. This can occur due to a system crash. In rare cases, servers can also be taken offline spontaneously -- for example, when the content is in violation of a law.
2. Webserver overload: If a webserver reaches its limit, it can't answer any more requests -- the gateway then delivers the status code 502 Bad Gateway.
3.Faulty Programming.
4.Communication error: Firewalls can cause errors on both sides of the communication (server and client) with the forwarding of requests.

How to Fix the 502 Bad Gateway Error
If you want to access a page and instead get the status code 502, there's a high chance that the error isn't with you. In most cases, it can be fixed by simply reloading the page. If the problem is solved by doing that, then it means that the server was just temporarily overloaded. Since such failures can also last for a fairly long time, reloading the page again is only really worth it after 15 minutes. Still receiving the same error message? Then clear your cache and cookies, as it could be that your browser didn't truly reload the page and instead just accessed data from your internal storage (you don't necessarily have to delete all of your cookies. Within your browser, you can display all of the cookies and remove only those that have something to do with the corresponding website.)

Why not open a ticket with your hosting provider?

try to contact your hosting provider this error is come very hosting memory is low

This is no 502 error. Obviously an Internet hiccup. Kudos for getting your link shown, though. lol