Lots of 404 for svg files - brocken APT?

Nextcloud version (eg, 20.0.5): 22.0.0
Operating system and version (eg, Ubuntu 20.04): Debian 10.10 (official Docker image)
Apache or nginx version (eg, Apache 2.4.25): 2.4.38
PHP version (eg, 7.4): 7.4.22

The issue you are facing:
In the browser console, there are tons of 404 errors about missing SVG files.

I tried to use aptitude to install php-imagick, but apt doesn’t seem to find any package ; I changed the apt sources to a working set of URL, I still see:

This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'php-imagick' has no installation candidate```

In aptitude, all the packages are "p" and I cannot install them... I've never seen such a broken Debian...

Any idea how to fix that?

Thanks in advance


Is this the first time you've seen this error? _(Y/N)_: N

Steps to replicate it:

1. Login to the server

The output of your Nextcloud log in **Admin > Logging**:


The output of your config.php file in `/path/to/nextcloud` (make sure you remove any identifiable information!):


The output of your Apache/nginx/system log in `/var/log/____`: