Why do I get notifications about incorrect server responses when using Cloudflare?

The cause of the error may be the unconfigured Cloudflare.

If you are interested in receiving notifications and checking the server's source IP address, please:

• Add our Notification Servers IP (from the technical documentation https://docs.tpay.com/#! /Tpay/tpay/tpay_notifications) to the list of allowed addresses in Cloudflare.
• Check if the server can see the real IP address of the client who visits the website. If not, it means that it isn't properly configured and depending on the mechanism used, you must set it.
  Please read the configuration tutorial https://support.cloudflare.com/hc/en-us/articles/200170786