Hi all,
I too have the same issue, 502 Bad Gateway. This is the older version of the S5 (~2019) and these errors started surfacing right after I upgraded to the firmware 8.2.1 version.
I'm sensing I'll have to revert to an earlier version of the firmware (if possible) as well if I want to be able to restore wifi printing again until someone from Ultimaker fixes this issue. If I had to go back to USB printing, this machine would drop significantly in value for my team and our workflow. Is there a good online tutorial for how to revert back to an older version of the FW? Is this even possible?
I hope someone can help us resolve this soon! If you have specific questions for me and my Ultimaker setup, let me know and I'll do my best to support our debugging process.
Thanks!
~CDM
Other potentially relevant details about my setup:
1. I have a more modern S5 and the FW update 8.2.1 seemed to take and I'm able to send wifi prints via Cura w/out issue.
2. I AM able to see the temperature graph if I navigate directly to the IP address assigned to the machine, but I can't access the management console nor printer feed > both yield "502 Bad Gateway"
3. There seem to be no other obvious issues with our network settings, wifi, etc that I'm aware of. I'm not a wifi admin so I can't tweak those settings easily. Seems like a product flaw if you need your IT admin to perform specialized setups if a standard / default / most common network setup is being used.
4. It will show a blue connected cloud in the Ultimaker Cura app for about 1 second, then it disappears.