diff --git a/WebHostLib/customserver.py b/WebHostLib/customserver.py
index 01f1fd25e5..da7b54ba6d 100644
--- a/WebHostLib/customserver.py
+++ b/WebHostLib/customserver.py
@@ -103,7 +103,7 @@ class WebHostContext(Context):
         room.multisave = pickle.dumps(self.get_save())
         # saving only occurs on activity, so we can "abuse" this information to mark this as last_activity
         if not exit_save:  # we don't want to count a shutdown as activity, which would restart the server again
-            room.last_activity = datetime.utcnow()
+            room.last_activity = datetime.datetime.utcnow()
         return True
 
     def get_save(self) -> dict:
diff --git a/worlds/AutoWorld.py b/worlds/AutoWorld.py
index 02b94c5fb7..8d9a1b0829 100644
--- a/worlds/AutoWorld.py
+++ b/worlds/AutoWorld.py
@@ -27,7 +27,8 @@ class AutoWorldRegister(type):
 
         # build rest
         dct["item_names"] = frozenset(dct["item_name_to_id"])
-        dct["item_name_groups"] = dct.get("item_name_groups", {})
+        dct["item_name_groups"] = {group_name: frozenset(group_set) for group_name, group_set
+                                   in dct.get("item_name_groups", {}).items()}
         dct["item_name_groups"]["Everything"] = dct["item_names"]
         dct["location_names"] = frozenset(dct["location_name_to_id"])
         dct["all_item_and_group_names"] = frozenset(dct["item_names"] | set(dct.get("item_name_groups", {})))
diff --git a/worlds/sc2wol/Locations.py b/worlds/sc2wol/Locations.py
index 3425dc7199..f69abd48e3 100644
--- a/worlds/sc2wol/Locations.py
+++ b/worlds/sc2wol/Locations.py
@@ -176,7 +176,8 @@ def get_locations(world: Optional[MultiWorld], player: Optional[int]) -> Tuple[L
                                    state._sc2wol_has_competent_anti_air(world, player) and
                                    state.has('Science Vessel', player)),
         LocationData("Devil's Playground", "Devil's Playground: Victory", SC2WOL_LOC_ID_OFFSET + 1300,
-                     lambda state: state._sc2wol_has_common_unit(world, player) or state.has("Reaper", player)),
+                     lambda state: state._sc2wol_has_anti_air(world, player) and (
+                             state._sc2wol_has_common_unit(world, player) or state.has("Reaper", player))),
         LocationData("Devil's Playground", "Devil's Playground: Tosh's Miners", SC2WOL_LOC_ID_OFFSET + 1301),
         LocationData("Devil's Playground", "Devil's Playground: Brutalisk", SC2WOL_LOC_ID_OFFSET + 1302,
                      lambda state: state._sc2wol_has_common_unit(world, player) or state.has("Reaper", player)),
diff --git a/worlds/subnautica/__init__.py b/worlds/subnautica/__init__.py
index 6562d93db0..806c1b195e 100644
--- a/worlds/subnautica/__init__.py
+++ b/worlds/subnautica/__init__.py
@@ -42,7 +42,7 @@ class SubnauticaWorld(World):
     option_definitions = Options.options
 
     data_version = 6
-    required_client_version = (0, 3, 4)
+    required_client_version = (0, 3, 5)
 
     prefill_items: List[Item]
     creatures_to_scan: List[str]