Cf-edge-cache response header is missing

I added my blog website to Cloudflare.
I installed Cloudflare wordpress plugin and when I go to setting page I am facing below issues :-

  • Unable to apply recommended Cloudflare settings for wordpress (on click apply spinner get sniping)
  • Unable to activate automatic platform optimization (get deactivated again when reload page again)
  • Getting warning message “cf-edge-cache response header is missing! Please clear any server cache used via other plugins.” in automatic platform optimization section.