When I'm trying to update packages using sudo apt-get update it ends with this error
W: The repository 'http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu xenial Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Failed to fetch http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu /dists/xenial/main/binary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
Can anyone help me ! Thanks.