Based upon the certificate history I see using the link I provided above (and the more thorough history I've linked in this post below), it looks like the approach taken in acquiring your certificates likely changed in July of 2024. It had been renewing consistently (likely automatically) every 60 days since then, which is the recommended time, until it didn't renew in March of 2025. Given that these have been wildcard certificates (cover *.safetymarineaust.com.au as a SAN/hostname), a DNS-01 challenge would have been required to acquire the certificates. Have you changed your DNS service provider (for example, your domain name registrar) sometime this year?
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