For the past 3 days, I have not encountered anybody whatsoever anywhere in Destiny 2. No players appear in the Tower when I go, no players are to be found anywhere in any world, my rosters say friends are online and in game but I can't find them, and I am never matched with anybody in Vanguard Strikes or any version of Crucible. The game just says, "Searching for Guardians" and searches endlessly. I've waited so long as 30 minutes without doing anything for a match, and there is nothing. It doesn't even find 1 other Guardian for me. Same with regular strikes or Vanguard Strikes. From what I remember, I believe this happened after I finished the quest for Sturm. Everything was fine until I came back from that quest, and after its completion I have encountered nobody at all since.