Could not issue a Let’s Encrypt SSL/TLS certificate on any web server

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21

so
ECDSAP256SHA256 - 2048
ECDSAP384SHA384 - 2048

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22

Yes, that is secure.
But since DNSSEC is not disabled... it might still fail [for other reasons].
But it might be failing due to key size 1024 ...
Failure reason unknown.

Try it that new way and let's see if that is enough to correct the problem.
It might take a few hours for the change to take effect.

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