Update app.py

app.py

@@ -17,7 +17,10 @@ login(token=hf_token)
 # 🔄 Load model from Hugging Face
 model_id = "dexcommunity/dex"
 print("🔄 Loading model...")
-tokenizer = AutoTokenizer.from_pretrained(model_id, token=hf_token)
+
+# ⚠️ FIXED this line: fast tokenizer disabled to avoid tokenizer.json crash
+tokenizer = AutoTokenizer.from_pretrained(model_id, token=hf_token, use_fast=False)
+
 model = AutoModelForCausalLM.from_pretrained(model_id, token=hf_token)
 
 device = torch.device("cuda" if torch.cuda.is_available() else "cpu")