I had a healthy Openvpn3 client running on my laptop, and every day used to successfully connect to my company's vpn without any hurdle.
However today things went wrong, and I'm no longer able to connect. This is the message error:
session-start: ** ERROR ** Failed to start new session: Failed calling D-Bus method Connect: Timeout was reached
I know yesterday openvpn3 was updated from repos.
Googling, I haven't found any interesting, just the usual purge openvpn3 and install again, which obviously I've done, and again there is no change. I can't connect to a remote vpn which is essential in my work.
Other possible source of error is the .ovpn config file, which I downloaded again today, so this not the cause.
I have the not so weird idea that either openvpn3 is bugged or there is a conflict with python3. A team mate had the same problem 1 week ago in a Windows machine. He reinstalled the GUI client and solved the issue.
This is my machine's OS, apt updated everyday.
Debian GNU/Linux 10 (buster)
kernel Linux 4.19.0-17-amd64
It happens that latest releases of openvpn3 are tricky, and the best solution was to downgrade version. Nothing more to do, and wait till a non buggy release is deployed.
As I stated in my question, a teammate, Windows user had the same issue.
So, the problem is code being released without proper testing, hence, do not ever trust latest updates from openvpn!
Adding to @digitai answer for those looking to for the downgrade command you can run this. Tested on ubuntu 20.04.