diff --git a/api/libs/oauth_data_source.py b/api/libs/oauth_data_source.py
index 48249e4a35..1d39abd8fa 100644
--- a/api/libs/oauth_data_source.py
+++ b/api/libs/oauth_data_source.py
@@ -253,6 +253,8 @@ class NotionOAuth(OAuthDataSource):
         }
         response = requests.get(url=f"{self._NOTION_BLOCK_SEARCH}/{block_id}", headers=headers)
         response_json = response.json()
+        if response.status_code != 200:
+            raise ValueError(f"Error fetching block parent page ID: {response_json.message}")
         parent = response_json["parent"]
         parent_type = parent["type"]
         if parent_type == "block_id":