diff --git a/data/ui_scripts/scoreboard/__init__.lua b/data/ui_scripts/scoreboard/__init__.lua
index fc5f55d..bd6360e 100644
--- a/data/ui_scripts/scoreboard/__init__.lua
+++ b/data/ui_scripts/scoreboard/__init__.lua
@@ -1,5 +1,7 @@
-function luiglobals.GetPartyMaxPlayers()
-    return Engine.GetDvarInt("sv_maxclients")
-end
-
-LUI.mp_hud.Scoreboard.maxPlayersOnTeam = luiglobals.GetTeamLimitForMaxPlayers(luiglobals.GetPartyMaxPlayers())
\ No newline at end of file
+if (LUI.mp_hud.Scoreboard) then
+    function luiglobals.GetPartyMaxPlayers()
+        return Engine.GetDvarInt("sv_maxclients")
+    end
+    
+    LUI.mp_hud.Scoreboard.maxPlayersOnTeam = luiglobals.GetTeamLimitForMaxPlayers(luiglobals.GetPartyMaxPlayers())
+end
\ No newline at end of file
diff --git a/src/client/component/ui_scripting.cpp b/src/client/component/ui_scripting.cpp
index 6ee253c..a7c1726 100644
--- a/src/client/component/ui_scripting.cpp
+++ b/src/client/component/ui_scripting.cpp
@@ -135,7 +135,13 @@ namespace ui_scripting
 				return;
 			}
 
-			scheduler::loop(ui_scripting::lua::engine::run_frame, scheduler::pipeline::renderer);
+			scheduler::loop([]()
+			{
+				if (game::Sys_IsMainThread())
+				{
+					ui_scripting::lua::engine::run_frame();
+				}
+			}, scheduler::pipeline::renderer);
 
 			hks_start_hook.create(0x1400E4E40, hks_start_stub);
 			hks_shutdown_hook.create(0x1400DB9A0, hks_shutdown_stub);
diff --git a/src/client/game/symbols.hpp b/src/client/game/symbols.hpp
index 60ebf8f..1503aec 100644
--- a/src/client/game/symbols.hpp
+++ b/src/client/game/symbols.hpp
@@ -220,6 +220,7 @@ namespace game
 	WEAK symbol<bool(int, void const*, const netadr_s*)> Sys_SendPacket{0x14038E720, 0x1404D8460};
 	WEAK symbol<void(Sys_Folder, const char* path)> Sys_SetFolder{0x14037BDD0, 0x1404CCA10};
 	WEAK symbol<void()> Sys_ShowConsole{0x14038FA90, 0x1404D98B0};
+	WEAK symbol<bool()> Sys_IsMainThread{0x1402FF9C0, 0x1403E1880};
 
 	WEAK symbol<const char*(const char*)> UI_GetMapDisplayName{0, 0x1403B1CD0};
 	WEAK symbol<const char*(const char*)> UI_GetGameTypeDisplayName{0, 0x1403B1670};