A proxy server received an invalid response from the upstream server. Retry request.
502 signifies that the IP assigned to your session ID is no longer available. If you encounter this error, there are two ways to work around it. The first is to wait for one minute as the system automatically assigns a new IP address to your session ID. Another approach is to switch to a new session ID (i.e., change the
sessid parameter) – this way, you will receive a new IP address.