Banking Billing not run with Cloudflare!

Hello CloudFlare community ! I am facing the follow problem - My Site use Banking Billing ( in portuguese “boleto bancário” ) - when CloudFlare is Turn On, the banking billing not run, only when I disable CloudFlare. Someone know that there is some configuration in the CloudFlare Control Panel to solve it ? I would like to post image, but I didn´t find option here. Thank you who can help me… Have a nice day !

Hi @vendas1, I upped your permissions so you should be able to add an image, lmk if not. I suspect you’re getting a timeout error on the process but if you can share error message or screen shot that would be helpful.