Very sad. This issue exists over 1 year, see for example this case: 8223.
Tried today with most recent conda and yml, but again, same fail.
Psychopy is just not compatible with recent Linuxes, yet.
Oh, wait, changelog looks promising:
support for wxPython 4.1
No, I had the most recent already:
psychopy -v
PsychoPy3, version 2020.2.2 (c)Jonathan Peirce 2018, GNU GPL license