Can you open Finder, Go->Go to Folder (or command + shift + G), and input the following paths:
Then press enter. For which ever has things, you go to the log folder and share the logs. If both have things, you remove both folders for clean install, then re-install the server app.
If it still does not start with the same message, you type the following in the console after removing all folders mentioned above:
And tell use what will that output?
~/.local/share/jellyfin
~/Library/Application Support/jellyfin
Then press enter. For which ever has things, you go to the log folder and share the logs. If both have things, you remove both folders for clean install, then re-install the server app.
If it still does not start with the same message, you type the following in the console after removing all folders mentioned above:
/Applications/Jellyfin\ Server.app/Contents/MacOS/jellyfin --webdir /Applications/Jellyfin\ Server.app/Contents/Resources/jellyfin-web --ffmpeg /Applications/Jellyfin\ Server.app/Contents/MacOS/ffmpeg --datadir ~/Library/Application Support/jellyfin
And tell use what will that output?