Cannot use or have problems using Let's Encrypt or sslforfree.com

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Getting Error While Processing sslforfree.com Certificate

I got the following error while getting the ssl certificate. Domain “www.vustudentshub.epizy.com” challenge3 failed. Response from “https://acme-v02.api.letsencrypt.org/acme/challenge/srZCb4c1CLGe2Fn37D0sgyVjFzV9tUrLLZji8XIrApo/13533556059” was: Warning: Your verification URL is not returning the correct contents to our verification servers. The URL looks like it is blocking bots and which inadvertently blocks our servers from receiving the correct content. Contact your host, a professional de…