A 502 Bad Gateway error is an HTTP status code that means that the server received an invalid response from the upstream server. This can happen for a number of reasons, such as the upstream server is down or overloaded, the upstream server is misconfigured, or there is a problem with the network between the two servers.
In terms of SEO, a 502 Bad Gateway error can be a problem because it can prevent search engines from indexing your pages. This can lead to a loss of traffic and rankings. If you are seeing 502 Bad Gateway errors on your website, it is important to troubleshoot the issue and fix it as soon as possible. Here are some things you can do:
Once you have fixed the issue that is causing the 502 Bad Gateway error, you can use Google Search Console to notify Google about the changes. This will help Google to re-crawl your pages and index them again.