Update pyiron_base.py

Author: jan-janssen

python_workflow_definition/src/python_workflow_definition/pyiron_base.py

@@ -217,7 +217,7 @@ def _get_edges_dict(edges_lst, nodes_dict, connection_dict, lookup_dict):
 
 
 def load_workflow_json(file_name, project=None):
-    if project is not None:
+    if project is None:
         project = Project()
 
     with open(file_name, "r") as f: