I can see 1.1.1.1 is responding. 38.88… is obviously a Cloudflare IP. PI network or something like that.
Please visit
https://1.1.1.1/help
wait for the tests to be finished an post the link here.
Bear in mind that outgoing DNS traffic (UDP/53) could be blocked by your network admins.
Occasionally, I lose connection to the Cloudflare dns servers for some reason