Hello
Everytime I leave the Slattern Inn I get stuck in the sea and cannot continue I know it says it was fixed for the thieves questline but I have got as far on that as I can and this was leaving after meeting Trevor , Using the steam version if that makes any difference which also say 0.22.4
So the fix is the use the in-built cheat to teleport to a valid place. It's in the menu, go to cheats > Refresh/Teleport > and then just teleport to Valos or somewhere that makes sense for you to be (like don't go to refugee camp or Hookton)