‘CN=R3,O=Let's Encrypt,C=US’ not valid

System: Ubuntu 22.04.3

I've got a problem, connecting to servers like download.nextcloud.com or using certbot to request certificates. It seams like ‘CN=R3,O=Let's Encrypt,C=US’ not longer valid.
Here are some errors I get:

Downoad with wget:
Resolving download.nextcloud.com (download.nextcloud.com)..., 2a01:4f9:2a:3119::181
Connecting to download.nextcloud.com (download.nextcloud.com)||:443... connected.
ERROR: cannot verify download.nextcloud.com's certificate, issued by ‘CN=R3,O=Let's Encrypt,C=US’:
Issued certificate not yet valid.
To connect to download.nextcloud.com insecurely, use `--no-check-certificate'.

An unexpected error occurred:
requests.exceptions.SSLError: HTTPSConnectionPool(host='acme-v02.api.letsencrypt.org', port=443): Max retries exceeded with url: /directory (Caused by SSLError(SSLCertVerificationError(1,
'[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate is not yet valid (_ssl.c:1007)')))

I tried to update reinstall certbot, removed certbot, disabled ipv6.

I've got no idea what to do.

Thanks a lot for help,

1 Like

Please check the date of your host and make sure it's correct. Currently it's August 5th 2023.


It seams that this was the problem!!!!
Now I will go to bed and sleep the whole weekend!!!!
Sorry and thanks a lot!


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