diff --git a/dlt/normalize/normalize.py b/dlt/normalize/normalize.py
index 6242c963f1..b7d4c6916a 100644
--- a/dlt/normalize/normalize.py
+++ b/dlt/normalize/normalize.py
@@ -48,7 +48,7 @@ class Normalize(Runnable[Executor], WithStepInfo[NormalizeMetrics, NormalizeInfo
     @with_config(spec=NormalizeConfiguration, sections=(known_sections.NORMALIZE,))
     def __init__(
         self,
-        extracted_count: int,
+        extracted_count: Optional[int] = None,
         collector: Collector = NULL_COLLECTOR,
         schema_storage: SchemaStorage = None,
         config: NormalizeConfiguration = config.value,
@@ -141,7 +141,7 @@ def map_parallel(self, schema: Schema, load_id: str, files: Sequence[str]) -> TW
                         # schedule the task again
                         schema_dict = schema.to_dict()
                         # TODO: it's time for a named tuple
-                        params = params[:3] + (schema_dict,) + params[4:] + (self.collector,)
+                        params = params[:3] + (schema_dict,) + params[4:]
                         retry_pending: Future[TWorkerRV] = self.pool.submit(
                             w_normalize_files, *params
                         )
diff --git a/dlt/pipeline/pipeline.py b/dlt/pipeline/pipeline.py
index 6c4cb7cf9d..862a0a6f5f 100644
--- a/dlt/pipeline/pipeline.py
+++ b/dlt/pipeline/pipeline.py
@@ -722,8 +722,12 @@ def run(
                 schema_contract=schema_contract,
                 refresh=refresh or self.refresh,
             )
-            self.normalize(loader_file_format=loader_file_format, extracted_count=extract_info.total_rows_count if extract_info else None)
+            self.normalize(
+                loader_file_format=loader_file_format,
+                extracted_count=extract_info.total_rows_count if extract_info else None,
+            )
             return self.load(destination, dataset_name, credentials=credentials)
+        return None
 
     @with_schemas_sync
     def sync_destination(