I don't see anything wrong in the logs. Must be something else.
Can you reach the piped container through localhost? Did you try to access it without the cloudflare proxy (it can be disabled in the cloudflare dns settings)?
Also check what the other guy said, it also could be that.
It seems like the 522 CF error happens when the connection times out (the server did not respond within x seconds). Can you provide the logs for the Piped container?
That is highly unlikely to happen.
This was a response from dessalines, one of the lemmy devs:
@erlend-sh We have no association with whoever made photon, and they've never contributed to lemmy-ui or the lemmy backend. I don't see us accepting as "official", a front end that we have no control over.
I don't see anything wrong in the logs. Must be something else.
Can you reach the piped container through localhost? Did you try to access it without the cloudflare proxy (it can be disabled in the cloudflare dns settings)?
Also check what the other guy said, it also could be that.