Fix: Update app.py to resolve Internal Server Error

app.py

@@ -304,8 +304,13 @@ def create_interface():
         )
         
         # Update export object dropdown when connection is made
+        def update_export_dropdown(status, visible, choices):
+            if visible and choices:
+                return gr.update(choices=choices, value=None)
+            return gr.update(choices=[], value=None)
+        
         connect_btn.click(
-            fn=lambda status, visible, choices: gr.update(choices=choices),
+            fn=update_export_dropdown,
             inputs=[connection_status, upload_tab, object_dropdown],
             outputs=[export_object]
         )
@@ -322,8 +327,11 @@ def create_interface():
             outputs=[export_fields, export_fields_info]
         )
         
+        def toggle_external_id(operation):
+            return gr.update(visible=(operation == "Upsert"))
+        
         operation_dropdown.change(
-            fn=lambda op: gr.update(visible=(op == "Upsert")),
+            fn=toggle_external_id,
             inputs=[operation_dropdown],
             outputs=[external_id_field]
         )
@@ -334,8 +342,11 @@ def create_interface():
             outputs=[upload_results, download_results]
         )
         
+        def show_download_results(file):
+            return gr.update(visible=file is not None)
+        
         download_results.change(
-            fn=lambda file: gr.update(visible=file is not None),
+            fn=show_download_results,
             inputs=[download_results],
             outputs=[download_results]
         )
@@ -346,8 +357,11 @@ def create_interface():
             outputs=[export_results, download_export]
         )
         
+        def show_download_export(file):
+            return gr.update(visible=file is not None)
+        
         download_export.change(
-            fn=lambda file: gr.update(visible=file is not None),
+            fn=show_download_export,
             inputs=[download_export],
             outputs=[download_export]
         )