Hi, I kind of had this experience a few days ago. Basically the block tree panel was just minimized to the right. i.e. the width was 0 and a mouse over and click fixed it. I hope this helps. It seems so obvious but it wasn't.
Cheers Johannes On 07.11.19 22:16, Achilleas Anastasopoulos wrote: > > Have you fixed this issue? > I got the same thing in Ubuntu 18.04 since yesterday and cannot figure > out what happened... > > Achilleas