Hi @Acatalin
that's wrong - https://check-your-website.server-daten.de/?q=zulip.rodi.es#ct-logs
| Issuer | not before | not after | Domain names | LE-Duplicate | next LE |
|---|---|---|---|---|---|
| Let's Encrypt Authority X3 | 2019-12-24 | 2020-03-23 | zulip.rodi.es - 1 entries | duplicate nr. 5 | next Letsencrypt certificate: 2019-12-31 07:55:41 |
| Let's Encrypt Authority X3 | 2019-12-24 | 2020-03-23 | zulip.rodi.es - 1 entries | duplicate nr. 4 | |
| Let's Encrypt Authority X3 | 2019-12-24 | 2020-03-23 | zulip.rodi.es - 1 entries | duplicate nr. 3 | |
| Let's Encrypt Authority X3 | 2019-12-24 | 2020-03-23 | zulip.rodi.es - 1 entries | duplicate nr. 2 | |
| Let's Encrypt Authority X3 | 2019-12-24 | 2020-03-23 | zulip.rodi.es - 1 entries | duplicate nr. 1 |
Five identical certificates. Where are these? Use one.