Writing new private key to…

Hello,

I’m trying to install Jitsi Meet on my debian 9.12 stretch and it fails. I already tried few weeks ago (failing too…) and uninstalled everything (with the purge command given in the quick-install guide) and now when I run the installation again, it seem to remember some things.

Generating a RSA private key
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writing new private key to '/etc/jitsi/meet/langevin.seelies.fr.key'
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cp: cannot create regular file '/etc/nginx/sites-available/langevin.seelies.fr.conf': No such file or directory

Why does it chose this file? How does it remembers it? Where do I go from there?

Thanks!