diff --git a/openpype/tools/ayon_loader/abstract.py b/openpype/tools/ayon_loader/abstract.py
index bf3e81d485..1d93716e07 100644
--- a/openpype/tools/ayon_loader/abstract.py
+++ b/openpype/tools/ayon_loader/abstract.py
@@ -531,6 +531,9 @@ class FrontendLoaderController(_BaseLoaderController):
 
         Product types have defined if are checked for filtering or not.
 
+        Args:
+            project_name (Union[str, None]): Project name.
+
         Returns:
             list[ProductTypeItem]: List of product type items for a project.
         """
diff --git a/openpype/tools/ayon_loader/models/products.py b/openpype/tools/ayon_loader/models/products.py
index 135f28df97..40b6474d12 100644
--- a/openpype/tools/ayon_loader/models/products.py
+++ b/openpype/tools/ayon_loader/models/products.py
@@ -179,12 +179,15 @@ class ProductsModel:
         """Product type items for project.
 
         Args:
-            project_name (str): Project name.
+            project_name (Union[str, None]): Project name.
 
         Returns:
             list[ProductTypeItem]: Product type items.
         """
 
+        if not project_name:
+            return []
+
         cache = self._product_type_items_cache[project_name]
         if not cache.is_valid:
             product_types = ayon_api.get_project_product_types(project_name)