LetsEncrypt not renew after fix-IP changes

hi, i have the Nextcloud-VM running, all ist ok and fine.
But i have change my fix-IP-Adress and now the letsencrypt-renew failed with the follow error:

Cert is due for renewal, auto-renewing…
Renewing an existing certificate
Performing the following challenges:
tls-sni-01 challenge for cloud.xxxx.de
Cleaning up challenges
Attempting to renew cert (cloud.xxxx.de) from /etc/letsencrypt/renewal/cloud.xxxx.de.conf produced an unexpected error: Problem binding to port 443: Could not bind to IPv4 or IPv6… Skipping.

All renewal attempts failed. The following certs could not be renewed:
/etc/letsencrypt/live/cloud.xxxx.de/fullchain.pem (failure)
1 renew failure(s), 0 parse failure(s)

what can i do?
please help me.


Ubuntu TLS
Netxcloud 12.0.2

You let letsencrypt spin up a small webserver for the certificate renewal? Then you need to stop the normal webserver who is already using this port. Or you don’t run this procedure as root, then you don’t have permissions to bind a service to a port.