How can I solve this problem or lowering back my PsychoPy version to 2020.2.2 could be useful (if yes, how can I do it? I couldn’t find 2020.2.2. setup).
Edit: I’ve downgraded my PsychoPy and problem solved. Now, I can run my experiments again. From my experiences, there is a problem with new release (2020.2.5)