While trying to get Insync to work after upgrading to Ubuntu 22.04, Jammy, I received this message:

Err:5 http://apt.insync.io/ubuntu 3 jammy InRelease
403 Forbidden
Reading package lists… Done
E: Failed to fetch http://apt.insync.io/ubuntu/dists/jammy/InRelease 4 403 Forbidden
E: The repository ‘http://apt.insync.io/ubuntu 3 jammy InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

This morning, May 2, 2022, they released a new version for Jammy.

I first tried sudo apt update, sudo apt upgrade, and it worked but I got a bunch of new errors in the terminal when I did a sudo apt update.

Decided to take a different approach and it cleared all the apt update errors, all is working again.

Download Insync_3.7.5.50350-jammy_amd64.deb

Ubuntu 22.04 –
https://cdn.insynchq.com/builds/linux/insync_3.8.6.50504-jammy_amd64.deb

Or use their Download Page:

https://www.insynchq.com/downloads

Then follow these steps:

1. Quit Insync
2 Remove existing Insync – Open downloaded Insync_3.7.5.50350-jammy_amd64.deb with Software Install, click red trash can
3. Remove all Insync in Software and Updates under Other Software
4. Remove all Insync files in /etc/apt/sources.list.d/
5. Open downloaded Insync_3.7.5.50350-jammy_amd64.deb with Software Install and click Install button

When the install was completed, I did not have to set it up again, the new install picked up on the previous installed information.