Cloudflare change response from backend server

all

#1

Hellow. Describe the problem. Now I have an endpoint on my backend-application which sends an exception on the frontend in error condition. This exception has a strong response format, but when I send the request, Cloudflare change the response from the server, and I could not understand how to fix it. Can u help me?
An original response has valid data, and local all worked good.