"Process Tree"-tab is empty

[Rosika2]

Hello altogether,

I´ve noticed that clicking on "Tools" in the firetools context-menu and then clicking on a certain PID
produces the overview of that process alright.
But when clicking on "Process Tree" the resulting window remains empty.

The other tabs seem to work alright; it´s just the "Process Tree" tab.

I assume this has something to do with the latest firejail update although I may be wrong there.

Currently I´m using firejail version 0.9.64. I updated only recently. The former firejail version didn´t display that behaviour.
Firetools version is 0.9.50-1

Any ideas what can be done done about it?

Thanks a lot in advance.

Greetings.
Rosika

P.S.:
system: Linux/Lubuntu 18.04.5 LTS, 64 bit

[Rosika2]

UPDATE

Hi again,

I just updated my firejail installation in my virtual machine (BodhiLinux).
Before doing that I checked how it dealt with the described "problem".

So now I can definitely say that firejail version 0.9.62.4 displayed all the processes in firetool´s "Process Tree" whereas
firejail version 0.9.64 leaves the tab completely empty.

So this has something to do with the new firejail version.

Greetings.
Rosika

[Rosika2]

Hi once more,

I´ve just installed the latest firetools version 0.9.62 in order to find out whether this one works with firejail 0.9.64.
Result: the problem remains. Again firetool´s "Process Tree" tab remains empty. So it seems to be an issue with firejail rather than firetools.

Greetings
Rosika.