diff --git a/lib/galaxy/webapps/base/webapp.py b/lib/galaxy/webapps/base/webapp.py
index 034079b1b3d9..cef148e4fffb 100644
--- a/lib/galaxy/webapps/base/webapp.py
+++ b/lib/galaxy/webapps/base/webapp.py
@@ -323,7 +323,7 @@ def __init__(
             assert session_cookie
             self._ensure_valid_session(session_cookie)
 
-        if hasattr(self.app, "authnz_manager"):
+        if hasattr(self.app, "authnz_manager") and self.app.authnz_manager:
             self.app.authnz_manager.refresh_expiring_oidc_tokens(self)  # type: ignore[attr-defined]
 
         if self.galaxy_session: