Added a check to make sure sizes are not None

.gitignore

@@ -0,0 +1 @@
+venv/

utils.py

@@ -118,7 +118,14 @@ def convert_unit(value, from_unit, to_unit):
 
 def get_total_file_sizes(run):
     """returns total size of byte strings in bytes"""
-    size_bytes = sum(size for sizes in run.summary.get('response_returned_files_sizes',[[]]) for size in sizes if sizes)
+    # for sizes in run.summary.get('response_returned_files_sizes',[[]]):
+    #     if sizes and sized is not None: 
+    #         for size in sizes:
+    file_sizes = run.summary.get('response_returned_files_sizes',[[]])
+    if file_sizes is None:
+        return 0
+                
+    size_bytes = sum(size for sizes in file_sizes for size in sizes if sizes and sizes is not None)
     return convert_unit(size_bytes, from_unit='B', to_unit=BASE_UNITS)
 
 def get_total_md_input_sizes(run):