Update xtts.py

xtts.py

@@ -69,7 +69,9 @@ def get_conditioning_latents(audio_path, **others):
     global model
     speaker_wav, pt_file=download_sample(audio_path)
     try:
-        if pt_file != None and os.path.exists(pt_file):
+        if pt_file != None:
+            if not os.path.exists(pt_file):
+                raise ValueError(f'{pt_file} not exists, regenerat it.')
             (
                 gpt_cond_latent,
                 speaker_embedding,