Error 502 Bad Gateway with CDN77 Servers

[gordon77]

Hello
I can't open the pictures in some galleries, when I try to open in new tab, I'm receiving Error 502 Bad Gateway message and it is saying that ;
"If you're a Visitor...
Please try again in a few minutes. If the problem persists for more than 30 minutes, try contacting website owner via a different channel.
As the Website administrator...
Please make sure the firewall on your origin server is disabled. It might be blocking the requests from the CDN77 servers.
If that is not the case, take a look at the article on troubleshooting error messages in our knowledgebase."

This error occurs for some galleries,not every galleries, I'm using expressvpn service beacuse of my country restrictons and connected via different european servers genereally Germany.
All protection features of expressvpn is off and I'm not facing this problem ob other adult sites. I have no firewall issue.
Is there any reason for that?

[patman21]

I used to get 404 errors mostly, but now I get either the endless loading and time out of the page, or I load an image of gif file and it shows as an error image with the little red X, but if you reload the page multiple times, it sometimes shows up. Also some galleries when you click on a photo, it just does endless loading and never loads while other photos in the gallery load just fine.

[longhairfish]

There is an announcement about this.