So apparently some people saw this as early as last year during the Grave Matters Event in SOLO mode in Conan Exiles.
I can confirm that so far no amount of restarts or Reboots on console will remove it. So something in SOLO play is triggering it currently on my PS4.
I can also confirm that hitting the acknowledge button removes pop-up until the next occurrence of pop-up, with no visible effect to game play, unless it happens at a crucial moment, in which case you will die.
Growing pains eh, if this was the most annoying thing happening in Conan I would be pumped.