Task: Roekaar Manifestos missing manifesto

I have this problem also. It's the 6th manifesto that is missing, the one in the at east and south of map you get during the quest fighting Roekaar and a fiend I think. Bit north of Mithrava ascent. I did the quest overlook or whatever but the datapad isn't there and I went back and clicked all the others already, can't complete quest.