fix: error in 'Process and Ingest Web Pages' under 'Add URLs to the Knowledge Base' (CWYD) (#1816)

Author: Priyanka-Microsoft

code/backend/pages/01_Ingest_Data.py

@@ -64,6 +64,11 @@ def sanitize_metadata_value(value):
 
 
 def add_url_embeddings(urls: list[str]):
+    has_valid_url = bool(list(filter(str.strip, urls)))
+    if not has_valid_url:
+        st.error("Please enter at least one valid URL.")
+        return
+
     params = {}
     if env_helper.FUNCTION_KEY is not None:
         params["code"] = env_helper.FUNCTION_KEY