What is the name of the domain?
avast - tn.com.tn
What is the issue you’re encountering
cloudflare features stop working when the dns cname in www is proxified. if you proxify only the root dns cname : all the cloudflare security features of the account will not work (for example the waf) but the website still working code : 200 if you proxify only the dns cname in www : the website will stop working error 403 but all the cloudflare security features of the account will work