Update app.py

app.py

@@ -133,7 +133,7 @@ async def main(
     model = None
     onnx_models = detect_onnx_models(models_path)
     lan.load_language(speaker)
-    if len(text_input)
+    if len(text_input) = None
       text_input = "Enter some text to generate"
 #    speaker_selection = widgets.Dropdown(
  #       options=[],