In the quest “Braving the Void” you should enter a rift to the void in the Plains of Strife. Problem is: I can’t find any. Can somebody help me please? Did you finish this quest?
There should be one, red rift same as the one you can find in the Blood Grove, you can hear as you get close.
Look harder, if all else fails, reload the map.
Last one I found was near the Aetherial corrupted area south about halfway between Fort Ikon and the Necropolis.