Look, I'm not trying to be rude and I don't claim to have all the answers. In fact, I asked you if you googled it because that's the first thing I do when I have an issue.
I posted the picture of the first Google result (highlighted answer) because it tells you exactly what the issue is. I suggest you focus on that rather than get worked up about my post.
It tells you "Error 522 indicates that Cloudflare is unable to reach the origin web server and the request times out", which means cloudflare can't connect to your server. I honestly don't know how to word it any clearer.
It looks like you turned on caching on cloudflare (which we recommend against), and your server is not accessible. Check your ip, port forwarding, etc.