add validation

serve/gradio_web_server.py

@@ -117,7 +117,7 @@ def add_text(state, text, image, image_process_mode, request: gr.Request):
     print(text, image)
     if not text or not image:
         print("text empty")
-        raise gr.Warning("Please provide both a prompt and an image.")
+        raise gr.Warning("Please provide a prompt and an image.")
 
     if len(text) <= 0 and image is None:
         state.skip_next = True