The experiment won't start second time

Hello,

I’ve been trying to set up my experiment and struggle with quite an interesting issue.
My experiments start normally, but only once. Each subsequent time Psychopy stuck at the start with a grey screen. There is no error or anything. I have to restart my PC after that to make it work again.

This green screen also applies to the demos and my experiment run fine on the other PC, so I don’t think the problem is with the experiment itself.

OS (e.g. Win10): Win10 64-bit
PsychoPy version : 2020.2.10
Standard Standalone? (y/n) If not then what?: yes