The repository ‘http://apt.insynchq.com/mint serena Release’ does not have a Release file.Data from such a repository can’t be authenticated and is therefore potentially dangerous to use.See apt-secure(8) manpage for repository creation and user configuration details.Failed to fetch http://apt.insynchq.com/mint/dists/serena/non-free/binary-amd64/Packages 403 ForbiddenSome index files failed to download. They have been ignored, or old ones used instead.
Hello! I just installed Linux Mint 18.1 KDE version. I think this problem might be still going on… Synaptic can not download all repository indexes. My error message:
The repository ‘cdrom://Linux Mint 18.1 Serena - Release amd64 20170125 xenial Release’ does not have a Release file
I tried changing the downloading mirrors, but I still get the error. Help please?
I just upgraded to Linux Mint 18.3 and now I’m getting that message again:
“The repository ‘http://apt.insynchq.com/mint sylvia Release’ does not have a Release file.Data from such a repository can’t be authenticated and is therefore potentially dangerous to use.See apt-secure(8) manpage for repository creation and user configuration details.Failed to fetch http://apt.insynchq.com/mint/dists/sylvia/non-free/binary-amd64/Packages 403 ForbiddenSome index files failed to download. They have been ignored, or old ones used instead.”