error handling

app.py

@@ -127,7 +127,7 @@ def model_inference(
     image,
 ):
     if image is None:
-        raise ValueError("`image` is None. It should be a PIL image.")
+        raise gr.Error("Load a new sample first!")
 
     # return "A"
     inputs = PROCESSOR.tokenizer(
@@ -229,7 +229,7 @@ with gr.Blocks(title="Beat the AI", theme=gr.themes.Base(), css=css) as demo:
 
     def result_string(model_pred, user_pred, solution):
         if solution == "":
-            return "Load a new sample first! 👆"
+            return ""
 
         solution_letter = chr(ord('A') + int(solution))
         solution_string = f"The correct answer is {solution_letter}."