When playing in the editor WebSocket connection successful but failed when playing in packaged, why?

Hi. Suggested solution does not work on my PC. Do anyone know if there is any other way of fixing certificate? And just to be sure. Does this fix also helps with editor behaviour or its only for packaged build? Thanks!

EDIT:
Found this forum entry. This one helped me so if coping certifcates does not work for you here is different solution to try