https://www.sslforfree.com/出現錯誤 - Linux

Dear All,

https://www.sslforfree.com/ test是我改過的,出現錯誤如下,不曉得可能是什麼問題呢?

Domain "cms.test.com" challenge3 failed. Response from
"https://acme-v02.api.letsencrypt.org/acme/challenge/hgiZPkc9O_ux_fUSXnRCJpMDJcGPaeSovNDl8xeTRvQ/8408229911"
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 developer or admin for further help with fixing it.

Error: DNS problem: NXDOMAIN looking up TXT for _acme-challenge.cms.test.com

Full Error: { "type": "dns-01", "status": "invalid", "error": { "type":
"urn:ietf:params:acme:error:dns", "detail": "DNS problem: NXDOMAIN looking up
TXT for _acme-challenge.cms.test.com", "status": 400 }, "url":
"https://acme-v02.api.letsencrypt.org/acme/challenge/hgiZPkc9O_ux_fUSXnRCJpMDJcGPaeSovNDl8xeTRvQ/8408229911",
"token": "W94k3YjHoKfeTTrmy-ROXrRFaPn5IQ6UjMTLWAskiwk" }

Benson

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