Hi,
I have done search of this issue and I know there is a known bug, but unfortunally, there is no updates for Ubuntu 20.04 that would fix it. And I am not able to find any workaround for it and I need one, because muy users are using Ubuntu-mate and when they find any sync issue, we are not able to see them because the main dialog is not opening.
If anyone knows any workaround, it would be apreciated.
Thank you!