update

app.py

@@ -270,7 +270,7 @@ with gr.Blocks() as app:
                         prompt_text = gr.Dropdown(
                             label="Transcript of the Reference Audio",
                             value=example_reference,
-                            choices=transcripts.keys()
+                            choices=list(transcripts.keys())
                         )
                         inp_ref_audio = gr.Audio(
                             label="Reference Audio",
@@ -301,4 +301,4 @@ with gr.Blocks() as app:
                             outputs=[om, output]
                         )
 
-app.queue().launch()
+app.queue(concurrency_count=2).launch()

requirements.txt

@@ -4,7 +4,7 @@ torch
 librosa==0.9.2
 numba==0.56.4
 pytorch-lightning
-gradio
+gradio==3.14.0
 ffmpeg-python
 tqdm==4.59.0
 cn2an