diff --git a/src/Jackett.Common/Indexers/FileList.cs b/src/Jackett.Common/Indexers/FileList.cs
index 2e81936dd..251efc808 100644
--- a/src/Jackett.Common/Indexers/FileList.cs
+++ b/src/Jackett.Common/Indexers/FileList.cs
@@ -144,11 +144,9 @@ namespace Jackett.Common.Indexers
                 throw new TooManyRequestsException("Rate limited", indexerResponse);
             }
 
-            if (response.StartsWith("{\"error\""))
+            if (response.StartsWith("{\"error\"") && STJson.TryDeserialize<FileListErrorResponse>(response, out var errorResponse))
             {
-                var error = STJson.Deserialize<FileListErrorResponse>(response).Error;
-
-                throw new ExceptionWithConfigData(error, configData);
+                throw new ExceptionWithConfigData(errorResponse.Error, configData);
             }
 
             if (indexerResponse.Status != HttpStatusCode.OK)
diff --git a/src/Jackett.Common/Serializer/STJson.cs b/src/Jackett.Common/Serializer/STJson.cs
index 59f89d76b..e87acaf9f 100644
--- a/src/Jackett.Common/Serializer/STJson.cs
+++ b/src/Jackett.Common/Serializer/STJson.cs
@@ -32,5 +32,20 @@ namespace Jackett.Common.Serializer
         {
             return JsonSerializer.Deserialize<T>(json, _SerializerSettings);
         }
+
+        public static bool TryDeserialize<T>(string json, out T result)
+            where T : new()
+        {
+            try
+            {
+                result = Deserialize<T>(json);
+                return true;
+            }
+            catch (JsonException)
+            {
+                result = default(T);
+                return false;
+            }
+        }
     }
 }