Letsencrypt renewal fails: Could not bind to IPv4 or IPv6.. Skipping

you probably run the script with (preconfigurated) --standalone when your server is already running at port 443.

You can stop server before renew and start them after.

man says:

--apache          Use the Apache plugin for authentication & installation
--standalone      Run a standalone webserver for authentication
--nginx           Use the Nginx plugin for authentication & installation
--webroot         Place files in a server's webroot folder for authentication
--manual          Obtain certificates interactively, or using shell script hooks

If I run renew with --apache I can’t get any error.

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