fixed exception error

app.py

@@ -150,14 +150,13 @@ def main():
                     else:
                         st.write("No results found.")
 
-                except Exception as e:
+            except Exception as e:
+                if 'None' in e:
+                st.warning("Please Click Load Dataset")
+                else:
                     st.error(f"Search failed: {e}")
 
-        except Exception as e:
-            if 'None' in e:
-                st.warning("Please Click Load Dataset")
-            else:
-                st.error(f"Failed to load dataset: {e}")
+
             
 
 if __name__ == "__main__":