[2.1.13] Crash loading save (UpdatableEntity check on fish fails)

[Sniper_of_Chess]

When I try to load single player save (from game version 2.1.12), the game starts to load it, but strangely it says that it is loading multiplayer save. Then At step "Consistency Check" it crashes.
I also tried autosaves from the same game, but the problems occurs there too.
Happenning since 2.1.13