What does Cloudflare Worker error code 522 indicate?

Cloudflare error code 522, 'Connection timed out', signifies that Cloudflare was unable to establish a connection with your origin server within the expected timeframe. This doesn't necessarily mean your server is down, but rather that it's taking too long to respond to Cloudflare's requests. It's a client-side timeout, meaning Cloudflare timed out *waiting* for a response, not that the origin server necessarily failed.