LetsEncrypt security challenge fails for IPV6

SYSTEM INFORMATION
OS type and version Debian Linux 10
Webmin version 1.994
Virtualmin version 7.1-1
Related packages SUGGESTED

I have recently enabled IPV6 and have gone to request new SSL certs from LetsEncrypt and get the following error.
Failed authorization procedure. autoconfig.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from Cluster Labs – Developing Cooperative Decentralised Artificial Intelligence 404, autodiscover.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from Cluster Labs – Developing Cooperative Decentralised Artificial Intelligence 404, clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from http://clusterlabs.ai/.well-known/acme-challenge/AtvEm3rRwGm85zzUazz1fTCYF6GNEywFP8on7xO3Kvc: 404, admin.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from http://admin.clusterlabs.ai/.well-known/acme-challenge/NFEeHIbXbPuhnJLta1EM7ar6BDZtyhcH92ObBbMjiJk: 404, webmail.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from http://webmail.clusterlabs.ai/.well-known/acme-challenge/ULbjTcQ3bnIa7ALsXPOF6t7xe9xp4EdDiBH6h6fi2q0: 404, www.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from Cluster Labs – Developing Cooperative Decentralised Artificial Intelligence 404, mail.clusterlabs.ai (http-01): urn:ietf:params:acme:error:unauthorized :: The client lacks sufficient authorization :: 2a01:4f9:c011:38e6::1: Invalid response from Cluster Labs – Developing Cooperative Decentralised Artificial Intelligence 404

Any help would be appreciated.

Did you fix? I can see https://clusterlabs.ai/ ok
Ignore its a old Certificate.

No… This is where is starts to get really weird.
I created a test domain called tester.tests and that screwed up my ability to see clusterlabs.ai. Instead requests to clusterlabs.ai ended up being directed to tester.tests. Deleting the tester.tests domain fixed the apache error but I am still unable to request a new security certificate because it fails the challenge. The current certificate still works for IPV4 requests but I suspect it is not happy with IPV6.

The ipv6 pointing tor right ipv4 is wrong here
Website test: clusterlabs.ai (internet.nl)
" Same website on IPv6 and IPv4close

"#### Verdict:

Your website on IPv6 does not seem to be the same as your website on IPv4."

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