Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
Your certificate is using the old "chain", this suggests that your apache config is pointing to an old copy of the "chain.pem" file rather than the latest version.
A certbot expert may be able to help you more. Did you follow a particular guide when setting up your bitnami server?
Hi thanks for your reply, actually after more investigation my sites work ok on windows and android, but not Chrome on mac, I think it's related to the Letsencrypt root certificate changes. I used certbot previously, not sure how to update the apache config, in the past trying to fix ssl problems on google cloud has led on to more issues. If someone knows please let me know. I have another 4 Google cloud sites that were working fine until yesterday
Indirectly.
Your real issue is that the site has been serving an incorrect chain.
And now that chain has expired and is still being served (incorrectly):
openssl s_client -connect www.childlinethailand.org:443 -servername www.childlinethailand.org
CONNECTED(00000005)
depth=0 CN = www.childlinethailand.org
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=0 CN = www.childlinethailand.org
verify error:num=21:unable to verify the first certificate
verify return:1
---
Certificate chain
0 s:CN = www.childlinethailand.org
i:C = US, O = Let's Encrypt, CN = R3
1 s:C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
i:O = Digital Signature Trust Co., CN = DST Root CA X3
---
I think my sites are fixed now, I needed to revoke and reissue the certificates which meant clearing up various issues with bitnami before the bncert tool actually worked
Can we remove the links to my website please
Cheers