Apparently developers accidentally released their entire new DLC for Outer Worlds as a free update for base game, then realised their mistake and rolled it back.
But this broke save-games for people who had already played the game with the new update 1.4.

There is currently no reaction from developers.

The only solution for now, is to load pre-update save-game, if you're lucky to have one, or to start new game.

Update 1:

  • Developers have aknowledged the problem, but so far there is still no fix, their only recommendation is to write to publisher support email.
  • Some people who did wrote to support, report that they received DLC for free, and that fixed their save-game problem.
  • Others report that support didn't helped them, and the only solution for them is to start new game.

tow-broken-saves

Sources:
Twitter
Obsidian forums