Update app.py

app.py

@@ -186,6 +186,10 @@ def update_translations(file, edited_table, mode):
     output_video_path = "output_video.mp4"
     logger.debug(f"Editable Table: {edited_table}")
 
+    if file is None:
+        logger.info("No file uploaded. Please upload a video/audio file.")
+        return None, [], None, "No file uploaded. Please upload a video/audio file."
+        
     try:
         start_time = time.time()  # Start the timer