Error 502

[emptyset]

Thank you for your reply.

Given that:
1) not all site pages return errors;
2) this is the only site that has this problem;
3) I get errors that are supposed to indicate server-side problems rather than being blacklisted;
4) I have been getting the error on several IPs (my IP is not static; rebooting my router is usually enough to get a new IP, and that did not solve the problem),
I slightly doubt that I have been blacklisted by CloudFlare.

Is it possible to find out for sure whether I have been blacklisted? Googling only gives a page for site administrators about how to blacklist IPs (maybe I am that bad at googling and searching?).