How do I create an admin user?

[TheDreadPirate]

First, you could have used our auto install script instead of manually downloading and installing our deb packages.

Code:

curl https://repo.jellyfin.org/install-debuntu.sh | sudo bash

The script also adds our repository to your apt sources so that you can install via apt and also get auto updates.

Regarding your posted problem. Has there ever been a Jellyfin install on this server? Go to /etc/jellyfin and open system.xml. What is the value of "IsStartupWizardComplete"?