No scrollbar in psychopy builder Gui

OS (Ubuntu 20.04.1 ):
PsychoPy version (PsychoPy v2020.2.10):
**Standard Standalone? n/Installed with conda
**What are you trying to achieve?: **
Reproduce the experiment created with an older version of the PsychoPy

What did you try to make it work?:
Reinstalling PsychoPy with various methods

What specifically went wrong when you tried that?:
PsychoPy GUI windows are not properly responsive, no scroll bars are visible, I can’t resize the windows.

Sorry for the newbie issue, I have created several projects using an older version of PsychoPy (3.0.0 I would assume but unfortunately not quiet sure.) which used to work properly, but after updating my PsychoPy, the older projects do not work. Additionally the scrollbar for the stimuli properties window doesn’t work (e.g. I am not able to see “size” and “unit” fields in polygon stimuli.) For the moment my problem is that debugging the code is hard due to the scrollbar and windows size problems