It seems your /etc/apt/sources.list has a hardcoded include listed in that file and when you deleted the app it deleted the list file in sources.d directory.
I don't know what that means or how to fix it
sudo mv /etc/apt/sources.list.d/jellyfin.list /etc/apt/sources.list.d/jellyfin.list.disabled
This renames the problematic file so it will no longer interfere with your system updates. You can always rename it back later if you want to troubleshoot it, or just delete it.
thanks that worked, but now it says this:
All packages are up to date.
Notice: Ignoring file 'jellyfin.list.save.2' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
Notice: Ignoring file 'jellyfin.list.save.1' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
How do i delete the files? I can't do it through the GUI, nautilus won't let me have root access?
Welcome to c/linux!
Welcome to our thriving Linux community! Whether you're a seasoned Linux enthusiast or just starting your journey, we're excited to have you here. Explore, learn, and collaborate with like-minded individuals who share a passion for open-source software and the endless possibilities it offers. Together, let's dive into the world of Linux and embrace the power of freedom, customization, and innovation. Enjoy your stay and feel free to join the vibrant discussions that await you!
Rules:
Stay on topic: Posts and discussions should be related to Linux, open source software, and related technologies.
Be respectful: Treat fellow community members with respect and courtesy.
Quality over quantity: Share informative and thought-provoking content.
No spam or self-promotion: Avoid excessive self-promotion or spamming.
No NSFW adult content
Follow general lemmy guidelines.