Actually, these errors are not new, but some are the same as a couple of years ago. It actually works the way I use it: installed it on /srv on an encrypted disk, left all default, entered among the allowed addresses the one for my ddns.
Two years ago, I removed them by following Nextcloud’s guides, but I no longer remember the steps.
Can anyone knowledgeable tell me how to improve this? Or better to ignore?
Starting with the fact that I understand little about php, I would be interested in removing at least the first two alerts, which are nice and orange. I do not use CalDAV.
I got to the bottom: I am left with three warnings, which I cannot fix, because the php8 modules are missing: apcu (or redis or memcached), present in php7, sodium and imagick. Otherwise all gone.