Hello world !!!

I found a quite strange feature in ROS 6.19:
After installing it, the log is empty.
When I try to reconfigure it, the configuration window
for system > logging stays empty.
I tried to add a new rule, but the topics list only show "unknown"
Also adding an action is impossible, when I click on "OK" the
dialog does not close, and the action is not addded.
In a terminal system>logging>print results in nothing, not even
a cursor show up, it just freezes. After cancelling the print, the
console shows # TOPICS ACTION PREFIX and no entries.

Has anyone a fix for that ?

Happened on the following devices yet :
RB532A (was ROS 6.11)
RB450 (was ROS 6.15)
miniRouter (was ROS 6.18)