diff --git a/renku/core/session/notebook_service.py b/renku/core/session/notebook_service.py
index a4c19799cd..04dee96dd9 100644
--- a/renku/core/session/notebook_service.py
+++ b/renku/core/session/notebook_service.py
@@ -45,7 +45,7 @@ def _get_token(client: LocalClient, renku_url: str) -> Tuple[str, bool]:
     """
     registered_token = client.get_value(section="http", key=urllib.parse.urlparse(renku_url).netloc)
     if not registered_token:
-        return _get_anonymous_credentials(renku_url=renku_url), False
+        return _get_anonymous_credentials(client=client, renku_url=renku_url), False
     return registered_token, True
 
 
diff --git a/renku/core/session/utils.py b/renku/core/session/utils.py
index 275eae7063..04c2f54d6f 100644
--- a/renku/core/session/utils.py
+++ b/renku/core/session/utils.py
@@ -49,5 +49,5 @@ def get_image_repository_host() -> Optional[str]:
     """Derive the hostname for the gitlab container registry."""
     renku_url = get_renku_url()
     if not renku_url:
-        return
+        return None
     return "registry." + urllib.parse.urlparse(renku_url).netloc