Why is it sometimes climbs the Cloudflare page?

The site runs through Cloudflare and I have periodically climbs this page, I suspect that not just me.
Why and how to fix it, who knows?
April 4th 20 at 13:26
2 answers
April 4th 20 at 13:28
502 Bad Gateway (with eng. bad gateway) error, which is given to the Internet sites in case there were problems on the side of the website relating to the work of proxy server, DNS server, or the hosting server. Belongs to the 5xx series errors, which usually indicate problems on the server side.
Read more: wikireality.ru/wiki/502_Bad_Gateway
April 4th 20 at 13:30
Dead server, who suffers from downs. Incorrectly I suspect, only You.

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