problem completing purchase at checkout, error.

Hello!

We are experiencing the following error when trying to complete the purchase:

https://imgur.com/O2U7N8B
“There was an error processing your purchase. Please check your payment method for any charges and review your purchase history before re-purchasing.”

https://imgur.com/7koF8vJ
Failed to load resource: the server responded with a status of 502 (Bad Gateway)
https://www.xxxxxx.br/?wc-ajax=checkout&wfacp_id=8830&wfacp_is_checkout_override=yes

We have already disabled cache plugins, payment plugins, and the funnelkit checkout, and the error still persists.

You can test the error here: (link private)

Simulate a purchase using the PIX method, to quickly test.

Could you check if it could be something in the theme?