Handle error in response

Libraries/SPTarkov.Server.Core/Callbacks/GameCallbacks.cs

@@ -1,7 +1,6 @@
 using SPTarkov.DI.Annotations;
 using SPTarkov.Server.Core.Controllers;
 using SPTarkov.Server.Core.DI;
-using SPTarkov.Server.Core.Exceptions.Profile;
 using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Request;
@@ -45,7 +44,13 @@ public class GameCallbacks(
     {
         if (saveServer.IsProfileInvalidOrUnloadable(sessionID))
         {
-            throw new ProfileIncompatibleException("This profile cannot be loaded due to it being invalid or unloadable!");
+            return new ValueTask<string>(
+                httpResponseUtil.GetBody(
+                    new GameStartResponse { UtcTime = 0 },
+                    Models.Enums.BackendErrorCodes.PlayerProfileNotFound,
+                    "This profile cannot be loaded due to it being invalid or unloadable!"
+                )
+            );
         }
 
         var startTimestampSec = timeUtil.GetTimeStamp();

Libraries/SPTarkov.Server.Core/Controllers/GameController.cs

@@ -1,5 +1,4 @@
 using SPTarkov.DI.Annotations;
-using SPTarkov.Server.Core.Exceptions.Profile;
 using SPTarkov.Server.Core.Extensions;
 using SPTarkov.Server.Core.Helpers;
 using SPTarkov.Server.Core.Models.Common;

Libraries/SPTarkov.Server.Core/Exceptions/Profile/ProfileIncompatibleException.cs

@@ -1,21 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace SPTarkov.Server.Core.Exceptions.Profile;
-
-public class ProfileIncompatibleException : Exception
-{
-    public ProfileIncompatibleException(string message)
-        : base(message) { }
-
-    public ProfileIncompatibleException(string message, Exception innerException)
-        : base(message, innerException) { }
-
-    public override string? StackTrace
-    {
-        get { return null; }
-    }
-}