W: Failed to fetch http://apt.insynchq.com/mint/pool/non-free/i/insync/insync_1.3.10.36104-trusty_amd64.deb 403 Forbidden

[SaidulHassan]

Thank you. It solved the problem.

@lpugoy

$ sudo apt-key remove ACCAF35C
$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ACCAF35C
$ sudo apt-get update