...

Services/Immortal/EconomyService.cs

@@ -11,7 +11,7 @@ public class EconomyService : IEconomyService
 
     public List<EconomyModel> GetOverTime()
     {
-        return buildEconomyOverTime;
+        return buildEconomyOverTime ?? [];
     }
 
     public void Subscribe(Action action)
@@ -67,6 +67,7 @@ public class EconomyService : IEconomyService
 
     public EconomyModel GetEconomy(int atInterval)
     {
+        if (buildEconomyOverTime == null) return new EconomyModel();
         return atInterval >= buildEconomyOverTime.Count
             ? buildEconomyOverTime.Last()
             : buildEconomyOverTime[atInterval];
@@ -218,7 +219,7 @@ public class EconomyService : IEconomyService
 
     private void CarryOverEconomyFromPreviousInterval(int interval, EconomyModel economyAtSecond)
     {
-        if (interval <= 0) return;
+        if (interval <= 0 || buildEconomyOverTime == null) return;
 
         economyAtSecond.Alloy = buildEconomyOverTime[interval - 1].Alloy;
         economyAtSecond.Ether = buildEconomyOverTime[interval - 1].Ether;