diff --git a/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/ResponseData.cs b/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/ResponseData.cs
index 450ffd18b..b597fc576 100644
--- a/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/ResponseData.cs
+++ b/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/ResponseData.cs
@@ -25,8 +25,8 @@ using Newtonsoft.Json;
 namespace ArchiSteamFarm.OfficialPlugins.SteamTokenDumper {
 	[SuppressMessage("ReSharper", "ClassCannotBeInstantiated")]
 	internal sealed class ResponseData {
-		[JsonProperty(PropertyName = "data", Required = Required.Always)]
-		internal readonly InternalData Data = new();
+		[JsonProperty(PropertyName = "data", Required = Required.DisallowNull)]
+		internal readonly InternalData? Data;
 
 #pragma warning disable CS0649
 		[JsonProperty(PropertyName = "success", Required = Required.Always)]
@@ -53,7 +53,7 @@ namespace ArchiSteamFarm.OfficialPlugins.SteamTokenDumper {
 #pragma warning restore CS0649
 
 			[JsonConstructor]
-			internal InternalData() { }
+			private InternalData() { }
 		}
 	}
 }
diff --git a/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/SteamTokenDumperPlugin.cs b/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/SteamTokenDumperPlugin.cs
index a71ea07c3..c1074a591 100644
--- a/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/SteamTokenDumperPlugin.cs
+++ b/ArchiSteamFarm.OfficialPlugins.SteamTokenDumper/SteamTokenDumperPlugin.cs
@@ -488,6 +488,12 @@ namespace ArchiSteamFarm.OfficialPlugins.SteamTokenDumper {
 					return;
 				}
 
+				if (response.Content.Data == null) {
+					ASF.ArchiLogger.LogGenericError(string.Format(Strings.ErrorIsInvalid), nameof(response.Content.Data));
+
+					return;
+				}
+
 				ASF.ArchiLogger.LogGenericInfo($"Data successfully submitted. Newly registered apps/subs/depots: {response.Content.Data.NewAppsCount}/{response.Content.Data.NewSubsCount}/{response.Content.Data.NewDepotsCount}.");
 
 				GlobalCache.UpdateSubmittedData(appTokens, packageTokens, depotKeys);