A lot more info is needed like versions installed, base platform versions, did it work before, what has changed, what modules have you installed in Nextcloud, did you search for ‘no alive nodes found) on the Nextcloud forums, do you believe this is a specific Nethserver issue?.
AI suggests:
The error "No alive nodes. All the 1 nodes seem to be down" in Nextcloud with Elasticsearch typically indicates that **Elasticsearch is not running or is unreachable** from the Nextcloud instance. Ensure that the Elasticsearch service is active and that the configuration settings in Nextcloud are correct to establish a connection.
No, I do not think is a specific Nethserver issue, but i thought, probably anyone under similar conditions could have been confronted with the same. It did not work before so nothing changed. It is not time critical because of personal use only. I am an absolute noob so I hoped for a simple and easy fixable issue
Nextcloud forums offer several approaches, but I started my search yesterday and for all off them I need more knowledge of how Nextcloud under nethserver works is configured and so on - see above: I am noob!
My System: Rocky Linux 9.7; ns core 3.19.0; 1.6.1 (Nextcloud 33 - Hub 26 Winter);fulltextsearch - elasitcsearchplatform 32.0.2