Update app.py

app.py

@@ -154,7 +154,7 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
     def update_button_state(audio, youtube_url):
         print(" audio: ",audio, " youtube_url: ", youtube_url)
         # Button is interactive if there's input and progress is 0 or 1 (not in progress)
-        return gr.Button(interactive=bool(audio) or bool(youtube_url !=))
+        return gr.Button(interactive=bool(audio) or bool(youtube_url !=""))
 
     audio_input.change(
         fn=update_button_state,