Can't access Corrupted Nexus

After finishing my first 2 Nexus Bosses,I tried accessing a 3rd one (in a different area) and I cannot traverse to it for some reason. Since I couldn't access it thought maybe that Nexus Map is bugged. But then I tried going to a 4th Nexus Map to test it out and I couldn't access that one either.

On the side of my screen it says it still that I still need to do the quest which is called Cataclysm's Wake where you need to complete a 3+ Corrupted Nexus. When I try to traverse with a a tier 3 map it won't let me. I also tried with other higher maps to see if they would for but they also didn't work.

Hopefully you guys can help cause I can't progress on the Atlas tree.

Never mind. Yeah it didn't have enough mods. Thank you so much!