When updating, I get the following error message:
W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial Release' does not have a Release file.
Here, I find another statement on this error: How can I fix a 404 Error when using a PPA or updating my package lists?
This recommends removing certain PPAs; and, I'm not sure if I should do that since it might mean not getting the updates that I need.
Is this what I should do?
sudo do-releases-upgradeto get an supported release of Ubuntu. help.ubuntu.com/community/EOLUpgrades Oh, it was an old PPA. I just had this problem myself, and it was solved by this trick. I came here first when I did a search.