fix Game.RoundStarted and improve error handling

Barotrauma/BarotraumaShared/SharedSource/LuaCs/Lua/LuaClasses/LuaGame.cs

@@ -119,9 +119,9 @@ namespace Barotrauma
 			get
 			{
 #if SERVER
-				return GameMain.Server.GameStarted;
+				return GameMain.Server?.GameStarted == true;
 #else
-				return GameMain.Client.GameStarted;
+				return GameMain.Client?.GameStarted == true;
 #endif
 			}
 		}

Barotrauma/BarotraumaShared/SharedSource/LuaCs/LuaCsHook.cs

@@ -216,7 +216,7 @@ namespace Barotrauma
 
 			if (methodInfo == null)
 			{
-				string parameterNamesStr = parameterNames == null ? "" : string.Join(", ", parameterNames == null);
+				string parameterNamesStr = parameterNames == null ? "" : string.Join(", ", parameterNames);
 				GameMain.LuaCs.HandleException(new Exception($"Method '{methodName}' with parameters '{parameterNamesStr}' not found in class '{className}'"));
 			}
 

Barotrauma/BarotraumaShared/SharedSource/LuaCs/LuaCsUtility.cs

@@ -89,7 +89,7 @@ namespace Barotrauma
 				}
 				else
 				{
-					GameMain.LuaCs.HandleException(new Exception("File access to \"" + path + "\" not allowed."));
+					throw new Exception("File access to \"" + path + "\" not allowed.");
 				}
 			}
 			else
@@ -100,12 +100,11 @@ namespace Barotrauma
 				}
 				else
 				{
-					GameMain.LuaCs.HandleException(new Exception("File access to \"" + path + "\" not allowed."));
+					throw new Exception("File access to \"" + path + "\" not allowed.");
 				}
 			}
-
-			return false;
 		}
+
 		public static bool IsPathAllowedLuaException(string path, bool write = true) =>
 			IsPathAllowedException(path, write, LuaCsSetup.ExceptionType.Lua);
 		public static bool IsPathAllowedCsException(string path, bool write = true) =>