I just added a friend on mine on GoG but he is not in my friends list and I'm not in his. We are both in eachothers friendlist when we look in Gwent, but when we challenge one another the quit button dissapears and we can't click on anything. We are then forces to alt+f4.

Obviously the system is malade:P

are you sure you have any, because that's why none appear on mine.