So I started playing Destiny again after a bit of a break. My Titan I had never really played on and they still didn't have their Solar Subclass. Well, I switched to wield the Darkness and I was locked out of being able to access any of the Light Subclasses. I even went through with the quest to get Solar abilities but it still won't let me access any of the Light subclasses. The Icon for them is cracked and broken looking and when I try to switch over to it, it just flashes red. please help.