Certificate Install Errors

Good Day All,

Can anyone assist to why i am getting the below error when trying to activate a Lets Encrypt certificate.

Wrote file to /tmp/acme-challenge-public/Fezi2uNlakkfnMo_TpCCTCiZaeDQDf4ex-8ua1NqEO0, but couldn’t download http://nextcloud.domainname.com/.well-known/acme-challenge/Fezi2uNlakkfnMo_TpCCTCiZaeDQDf4ex-8ua1NqEO0: Error:
Url: http://nextcloud.domainname.com/.well-known/acme-challenge/Fezi2uNlakkfnMo_TpCCTCiZaeDQDf4ex-8ua1NqEO0 Data: None Response Code: None Response:

nextcloud.domainname.com normally uses encryption to protect your information. When Brave tried to connect to nextcloud.domainname.com this time, the website sent back unusual and incorrect credentials. This may happen when an attacker is trying to pretend to be nextcloud.domainname.com, or a Wi-Fi sign-in screen has interrupted the connection.

Your information is still secure because Brave stopped the connection before any data was exchanged.

Can you confirm that the diagnosis doesn’t report any issue related to port forwarding for port 80, and basic DNS records, and web exposure ?

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