Hi,
What is your SSL setting?
Which version of the plugin are you using?
Are there any errors in the PHP error log?
Thanks,
John
I don’t use SSL.
I use the latest versions of cloud flare plugin and wp too.

The image you posted isn’t loading. Can you try posting it again please?
Thanks,
John
Hi,
This 502 error is most likely an error with your web host.
In this case, and you should contact your hosting provider for further troubleshooting. Reviewing the access & error logs of your web server is a great place to start when these errors occurs as they should:
confirm the response code is being returned by your web server (this is visible in your access logs)
give some indication as to why (this is visible in the error logs, typically)
Have you tried contacting your web host about this error?
In the error log I can see the “8264#0: *4280170 upstream sent too big header while reading response header from upstream”
What does this mean?
What can I do?
I’m sorry I’ll need you to open a support ticket at Cloudflare.com. We only use the WordPress support forum to debug issues with the plugin itself.
Thanks,
John