Hello , my friend when started the SL questline his Screen turn to blackout screen how can we fix that anyone know ?
Hi! We would first of all recommend that your friend has run through all the steps here: https://support.blizzard.com/article/000014477
If the issue persists he can contact Customer Support or upload his system files to pastebin.com and reply with the links to the files using the preformatted text option to encapsulate the links.